ChemicalBook >> CAS DataBase List >>Sodium sulfate

Sodium sulfate

CAS No.
7757-82-6
Chemical Name:
Sodium sulfate
Synonyms
Na2SO4;SODIUM SULPHATE;Sodium Sulphate Anhydrous;Anhydrous sodium sulfate;Sodium sulfate, anhydrous;anhydrous sodium sulphate;NaSO;Disodium sulphate;Mirabilite;Natriumsulfat
CBNumber:
CB4100946
Molecular Formula:
Na2SO4
Molecular Weight:
142.04214
MDL Number:
MFCD00003504
MOL File:
7757-82-6.mol
MSDS File:
SDS
Last updated:2023-12-25 15:35:27

Sodium sulfate Properties

Melting point 884 °C (lit.)
Boiling point 1700°C
Density 2.68 g/mL at 25 °C (lit.)
refractive index 1.484
storage temp. Store at +5°C to +30°C.
solubility H2O: 1 M at 20 °C, clear, colorless
form powder (fine)
Specific Gravity 2.68
color White
PH 5.2-8.0 (50g/l, H2O, 20℃)
PH Range 5.2 - 9.2
Odor wh. cryst. or powd., odorless, bitter saline taste
Water Solubility 18.5 mg/L
λmax λ: 260 nm Amax: 0.015
λ: 280 nm Amax: 0.015
Sensitive Hygroscopic
Merck 14,8680
Dielectric constant 2.7(Ambient)
Stability Stable. Incompatible with strong acids, aluminium, magnesium, strong bases. Hygroscopic.
LogP -1.031 (est)
CAS DataBase Reference 7757-82-6(CAS DataBase Reference)
FDA 21 CFR 186.1797; 172.615; 173.310; 177.1200
Indirect Additives used in Food Contact Substances SODIUM SULFATE, ANHYDROUS
EWG's Food Scores 1
FDA UNII 36KCS0R750
ATC code A06AD13,A12CA02
NIST Chemistry Reference Sodium sulfate(7757-82-6)
EPA Substance Registry System Sodium sulfate (7757-82-6)

SAFETY

Risk and Safety Statements

Symbol(GHS)  GHS hazard pictograms
GHS07
Signal word  Warning
Hazard statements  H317
Precautionary statements  P261-P272-P280-P302+P352-P333+P313-P321-P363-P501
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  24/25
WGK Germany  1
RTECS  WE1650000
3
TSCA  Yes
HS Code  28331100
Toxicity LD50 orally in Rabbit: > 2000 mg/kg
NFPA 704
0
1 1

Sodium sulfate price More Price(150)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich SX0760E Sodium sulfate anhydrous, crystals, Meets ACS Specifications Tracepur? 7757-82-6 500g $97.3 2024-03-01 Buy
Sigma-Aldrich SX0760E Sodium sulfate anhydrous, crystals, Meets ACS Specifications Tracepur? 7757-82-6 2.5kg $190 2024-03-01 Buy
Sigma-Aldrich SX0760E Sodium sulfate anhydrous, crystals, Meets ACS Specifications Tracepur? 7757-82-6 12kg $473 2024-03-01 Buy
Sigma-Aldrich SX0760E Sodium sulfate anhydrous, crystals, Meets ACS Specifications Tracepur? 7757-82-6 45kg $1320 2024-03-01 Buy
Sigma-Aldrich SX0760 Sodium sulfate anhydrous, crystals, Meets ACS Specifications, Meets Reagent Specifications for testing USP/NF monographs GR ACS 7757-82-6 500g $64.4 2024-03-01 Buy
Product number Packaging Price Buy
SX0760E 500g $97.3 Buy
SX0760E 2.5kg $190 Buy
SX0760E 12kg $473 Buy
SX0760E 45kg $1320 Buy
SX0760 500g $64.4 Buy

Sodium sulfate Chemical Properties,Uses,Production

Description

Sodium Sulfate(7757-82-6), Na2S04, also known as thenardite and salt cake, is a crystalline compound that melts at 888°C (1632°F). Sodium Sulfate is found in natural form(thenardite) in Chile and Spain. It is used in the manufacture of paperboard, glass,and freezing mixtures. The hydrate, Na2S04·10H20, also known as "Glauber's salt," is a white water-soluble solid formed by heating Sodium chloride and sulfuric acid. It is used in dyeing,manufacturing glass,and in the preparation of sodium bisulfate.
sodium sulfate powder
sodium sulfate powder

Chemical raw materials

Sodium sulfate(7757-82-6) is an important chemical raw material and is the main raw material for production of sodium sulfide, sodium silicate and other chemical products. It can also be used as filler of synthetic detergent. In the paper industry, it can be used as the cooking agent for the manufacturing of paper pulp of sulfate.
Sodium sulfate, also known as anhydrous Glauber's salt or anhydrous mirabilite, appears as white monoclinic crystal or fine powder with the relative density being 2.68 and the melting point being 884 ℃. It can be dissolved in water with the aqueous solution being neutral. It is soluble in glycerol and insoluble in ethanol. It is easy to absorb water when being exposed to become hydrous sodium sulfate. It is a homogeneous polycrystalline material and is rhombus at a temperature of 32.4~223 ℃ with generating shaped monoclinic crystal at higher temperatures and generating hexagonal crystals in 241 ℃. When being crystallized from solution, it has high affinity to iron, iron compound and various kinds of other organic compounds; high-purity, fine-particle anhydrous sodium sulfate is called as “YuanMingFen”.
There are two kinds of crystalline hydrate compound of sodium sulfate: one is heptahydrate sodium Na2SO4·7H2O, being white sixty or tetragonal crystal with dehydrating at 24.4 ℃. Another is sodium sulfate decahydrate Na2SO4·10H2O with conventional name being Glauber's salt, “YuanMingFen”, insurance powder. It appears as colorless monoclinic crystal with the density being 1.464g/cm3, the melting point of 32.38 ℃ and loss of crystal water to becomes anhydrous sodium sulfate at 100 ℃. It is easily soluble in water and is easily weathered in dry air to become a dry white powder. Sodium sulfate can be used as chemical analysis reagent such as dye testing; printing industry apply it as mordant agent for making sodium sulfide, glass, water glass, enamel, quantitative measurement of nitrogen and papermaking pulp. In medical care field, it can be used as the antidotes of medical diuretics, laxatives and barium salt poisoning. There are also sodium salt crystals precipitated from salt ponds in winter.
Naturally occurring sulfate mineral is widely distributed with mostly existing in magnesium sulfate (calcium) complex salt and mirabilite. There are relative large amount of salt lakes in China's Inner Mongolia, Qinghai, Tibet, and some places of Xinjiang. There is large amount of sodium sulfate in the salt lake. Industrial preparation of sodium sulfate is mainly isolated from natural mineral or by the mirabilite dehydration and treatment with sulfuric acid to obtain sodium chloride. Sodium sulfate is also the byproduct of a lot of chemical industrial production sector and can be extracted from the waste liquid discharged during the production of viscose fiber and cellophane. In the production of sodium dichromate, phenols, boric acid, lithium carbonate, and certain pigments, there is also sodium sulfate as byproduct. Sulfate decahydrate, when being heated to the melting point (32.38 ℃), it can be dissolved its own crystal water while generating anhydrous salt. This temperature is the temperature at which the decahydrate salt, anhydrous salt and saturated solution, the three-phases reaches equilibrium temperature. As long as the three-phase coexists, the temperature is constant. Therefore the system can be used for as constant temperature bath or for calibration of temperature. Another feature of sodium sulfate is being prone to become supersaturated solution.

The main function

Sodium sulfate is an important raw material in the manufacturing of glass and paper with the maximum usage amount in the paper and cellulose industry which accounts for around 70% of the total amount. Sodium sulfate is the component of synthetic detergent and is a neutral salt. It can be added to the detergent to reduce the surface tension as well as increases the solubility of the detergent. It is also be used as the dye diluent and the auxiliary agent of the dye printing, as direct dyes, sulfur dyes, vat dyes and other accelerant of dyed cotton fiber, as retarding agent for direct dye silk. In the chemical industry, it can be used as the raw material for the manufacturing of sodium sulfide, gypsum, sodium silicate and other chemical products. It has been now developed of the method for making sulfuric acid, sulfur, soda ash, ammonium sulfate and other products with sodium sulfate. However, due to the high cost of these methods, it has not yet been widely applied. It has been commonly used by laboratory system for using sodium sulfate as cold agent. Glauber's salt has been used as a laxative medicine. The sodium sulfate entering into the body is largely stuck in the gastrointestinal tract without being absorbed and being maintained at certain penetration. It can increase the volume of the intestines and induce intestinal peristalsis with diarrhea effect. Sodium sulfate is the antidote of barium and lead poisoning. Upon lead poisoning, people can apply gastric lavage with 10% Glauber's salt or orally administer 1 to 2% sodium sulfate solution.
The above information is edited by the chemicalbook of Dai Xiongfeng.

Pharmacological effects

Apply oral administration of small amount with its ionic and osmotic pressure effect being able to slightly stimulate the digestive tract mucosa and causes a slight increase of the gastrointestinal secretion and a slight increase in the movement, therefore it has stomachic effect.
Orally administer a large amount with a lot of sodium sulfate being dissolved in large amount of water for oral administration. Since the ions are not easily absorbed and can maintain large amount of water in the intestines and can mechanically stimulate the intestinal mucosa and can soften the fecal matter and accelerate the defecation. It is clinically mainly used in the treatment of large intestine constipation, eliminating the intestinal toxins as well as getting rid of parasites.

Solubility in water (g / 100ml)

The amount (grams) can be dissolved per 100 ml of water at different temperatures (℃):
4.9g/0 ℃; 9.1g/10 ℃; 19.5g/20 ℃; 40.8g/30 ℃; 48.8g/40 ℃
45.3g/60 ℃; 43.7g/80 ℃; 42.7g/90 ℃; 42.5g/100 ℃

Identification test

Sodium test of 5% of the sample liquid (IT-28) and sulfate test (IT-29) result is positive.

Content Analysis

Accurately weigh 500 mg of sample pre-dried for 4 h at 105 ℃ and dissolve it in 200ml of water; Add 1 mL of hydrochloric acid and heat to boiling. Under constant stirring, add in portions of a small amount (around 10 mL) of hot barium chloride test solution (TS-37), heat on a steam bath for 1h and filter out the precipitate with further washing with water until being chloride-free. After drying, burn and weigh it with the mass of barium sulphate then multiplying by 0.6086, namely is equivalent to sodium sulfate (of Na2SO3) content.

Toxicity

ADI does not make restrictive regulations (FAO/WHO, 2001).
GRAS (FDA, §186. 1797, 2000).
LD50: 5989mg/kg (mice through oral administration).

Chemical Properties

It appears as white monoclinic crystal or powder. It can be dissolved in water with the aqueous solution being alkaline. IT can be dissolved in glycerol and is insoluble in ethanol.

Uses

It can be mainly used as the filler of synthetic detergent. Paper industry applies it for the cooking agent during the manufacture of sulfate pulp. Glass industry uses it as substitute of soda. Chemical industry applies it as the raw material for the manufacturing of sodium sulfide, sodium silicate and other chemical products. Textile industry applies it for the formulation of Vinylon spinning coagulation bath. The pharmaceutical industry applies it as laxatives. It can also be used in non-ferrous metallurgy and leather.

Production method

Vacuum evaporation method: clarify the natural Glauber's salt after dissolving it; put the clarified solution for vacuum evaporation dehydration, thickening, centrifugation and separation and drying to obtain anhydrous sodium sulfate. The reaction equation is: Na2SO4·10H2O → Na2SO4 + 10H2O
Calcium mirabilite method: crush the ore of calcium mirabilite, add water ball for grinding, leach, with the leached Glauber's salt being subject to removal of impurities via filtering out. After the clarification of the filtrate, then perform evaporation for dehydration, centrifugation, drying to obtain the anhydrous sodium sulfate. The reaction is:
Na2SO4·CaSO4 + 2H2O → Na2SO4 + CaSO4·2H2O
Conversion method uses the byproduct, high and low-temperature salt produced from potassium chloride as the raw material for making anhydrous sodium sulfate. Under certain conditions of temperature and ingredients, through three sections of transformation, magnesium sulfate and sodium chloride have been first converted into bloedite and then further converted to anhydrous sodium magnesium sulfate and finally being converted to anhydrous sodium sulfate. The entire conversion process is a continuous countercurrent operation with pulp relying the mechanical driving and elevation, liquid undergoing reverse overflow via potential difference. The conversion of the first segment is controlled at Ph value of 3 to 4 with reaction at a temperature of 55~70 ℃. The generated white sodium magnesium alumina slurry, after entering into a settler for thickening and then sent to the secondary conversion tank; secondary conversion has Ph of 4~5 and temperature of about 100 ℃; third conversion conditions is controlled at Ph5~6 with the temperature being about 55 ℃. Under stirring, the anhydrous loeweite can react with an aqueous solution of sodium chloride to generate anhydrous sodium sulfate crude product with centrifuge, separation, drying to obtain the anhydrous sodium sulfate to obtain. The reaction equation is:
2NaCl + 2MgSO4 + 4H2O → Na2SO4·MgSO4·4H2O + MgC12
Na2SO4·MgSO4·4H20 → Na2SO4·MgSO4 + 4H2O
Na2SO4·MgSO4 + 2NaCl → 2Na2SO4 + MgCl2
This method has high cost, low recycling rate with sulfuric acid consumption and the impurities not being prone to be removed. The resulting product is of poor color, but with simple equipment. Rayon byproduct method: the rayon solidification waste undergoes crystallization, dissolution, neutralization, filtration, concentration, cooling, separation and drying process to obtain anhydrous sodium sulfate. The reaction equation is:
H2SO4 + 2NaOH → Na2SO4 + 2H2O

Chemical Properties

Sodium sulfate, NaS04, also known as thenardite and salt cake, is a crystalline compound that melts at 888°C (1632°C). Sodium sulfate is found in natural form(thenardite) in Chile and Spain. It is used in the manufacture of paperboard, glass,and freezing mixtures. The hydrate, Na2S04·10H20, also known as "Glauber's salt," is a white water-soluble solid formed by heating sodium chloride and sulfuric acid. It is used in dyeing,manufacturing glass,and in the preparation of sodium bisulfate.

Chemical Properties

Sodium sulfate is a white crystalline solid. It frequently is found as the decahydrate

Physical properties

Anhydrous sodium sulfate is a white crystalline powder; orthorhombic or hexagonal structure; hygroscopic; refractive index 1.468; hardness 2.8 Mohs; density 2.664 g/cm3; melts at 884°C; soluble in water, insoluble in ethanol.
The decahydrate consists of colorless monoclinic crystals; refractive index 1.394; hardness 1.8 Mohs; density 1.4 6g/cm3; decomposes at 32°C; soluble in water; insoluble in ethanol.

Occurrence

Sodium sulfate occurs in nature as the minerals mirabilite and thenardite. While thenardite is the anhydrous form of Na2SO4, mirabilite is a naturallyoccurring decahydrate, Na2SO4?10H2O.
Sodium sulfate is one of the most important sodium salts. The decahydrate,commonly known as the Glauber’s salt, was first prepared by Johann Glauber in the seventeenth century as a by-product in making hydrochloric acid from sulfuric acid and sodium chloride.
Sodium sulfate is used in manufacturing paper pulp by the Kraft Process. Other uses are in manufacturing glass and ultramarine; in dyeing and printing textiles; as a filler in synthetic detergents; and for standardizing dyes. A major use of anhydrous sodium sulfate is as an agent to remove water from organic solvents and their extracts for organic synthesis and instrumental analysis. Sodium sulfate is a common laboratory reagent. Also, it is used to prepare other sodium salts.

Uses

Sodium sulfate is a filler in the manufacturing of synthetic detergents and soaps and a laboratory reagent. It may enhance the irritant action of certain detergents.

Uses

Used in kjeldahl nitrogen determination; drying agent .

Uses

Sodium Sulfate is the salt of sulfuric acid that is readily soluble in water and exists as crystals or crystalline powder. it is used in cara- mel production.

Production Methods

Sodium sulfate is mined from its natural mineral deposits and subjected to purification.
Sodium sulfate is synthesized by the Mannheim process or Hargreaves process. Manheim’s process is based on Glauber’s reaction between sulfuric acid and sodium chloride: 2NaCl + H2SO4 → Na2SO4 + 2HCl↑
The process was devised by Johann Glauber to produce hydrochloric acid. Sodium sulfate is isolated from the solution by fractional crystallization.
Hargreaves’ process also was developed to produce hydrochloric acid. It is a variation of Mannheim’s method. In this method, sulfur dioxide is used instead of sulfuric acid. The reaction is as follows: 4NaCl + 2SO2 + O2 + 2H2O → 2Na2SO4 + 4HCl↑
Sodium sulfate also is obtained as a byproduct of manufacturing phenol by caustic fusion.

Definition

A white crystalline compound, Na2SO4, usually known as the anhydrous compound (orthorhombic; r.d. 2.67; m.p. 888°C) or the decahydrate (monoclinic; r.d. 1.46; which loses water at 100°C). The decahydrate is known as Glauber’s salt. A metastable heptahydrate (Na2SO4·7H2O) also exists. All forms are soluble in water, dissolving to give a neutral solution. The compound occurs naturally as
mirabilite (Na2SO10H2O),
threnardite (Na2SO4), and
glauberite (Na2SO4·CaSO4).
Sodium sulphate may be produced industrially by the reaction of magnesium sulphate with sodium chloride in solution followed by crystallization, or by the reaction of concentrated sulphuric acid with solid sodium chloride. The latter method was used in the Leblanc process for the production of alkali and has given the name salt cake to impure industrial sodium sulphate. Sodium sulphate is used in the manufacture of glass and soft glazes and in dyeing to promote an even finish. It also finds medicinal application as a purgative and in commercial aperient salts.

General Description

Sodium sulfate (Na2SO4) can be obtained directly via precipitation from a saturated solution of Na2SO4 at room temperature (20°C). Its crystallization and growth rates at room temperature (20°C) under various conditions have been investigated. Sodium sulfate can be produced during Leblanc process, from sodium chloride and sulfuric acid.

Flammability and Explosibility

Non flammable

Safety Profile

Moderately toxic by intravenous route. Mildly toxic by ingestion. An experimental teratogen. Experimental reproductive effects. Questionable carcinogen with experimental tumorigenic effects. Violent reaction with Al. When heated to decomposition it emits toxic fumes of SOx and Na2O. See also SULFATES.

Potential Exposure

Sodium sulfate is used in the manufacture of glass; as a precipitating agent in the manufacture of silver emulsions; as an analytical reagent; in making ultramarine and paper pulp; in ceramic glazes and pharmaceuticals; as a food additive; and a filler in synthetic detergents.

Veterinary Drugs and Treatments

Sodium sulfate is used as a saline cathartic, primarily in food animals.

Shipping

UN2630 Selenates or Selenites, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.

Purification Methods

Crystallise sodium sulfate from water at 30o (1.1mL/g) by cooling to 0o. It becomes anhydrous at 32o.

Incompatibilities

Violent reaction with aluminum, magnesium. Attacks metals in the presence of moisture.

Waste Disposal

Do not discharge waste sodium sulfate directly into sewers or surface waters. Recovered sodium sulfate may be disposed of by burial in a landfill.

Global( 782)Suppliers
Supplier Tel Email Country ProdList Advantage
Jiangsu Kolod Food Ingredients Co.,Ltd.
+86-518-85110578 +8618805133257 sales3257@jskolod.com China 132 60
Hebei Nafu Technology Co. , Ltd.
+8615075022224 17745771666@hebeinafu.com China 325 58
Hebei Yanxi Chemical Co., Ltd.
+8617531190177 peter@yan-xi.com China 5960 58
Henan Bao Enluo International TradeCo.,LTD
+86-17331933971 +86-17331933971 deasea125996@gmail.com China 2504 58
Hebei Jingbo New Material Technology Co., Ltd
+8619931165850 admin@hbjingbo.cn China 1000 58
Henan Fengda Chemical Co., Ltd
+8613613820652 info@fdachem.com China 4685 58
Henan Tianfu Chemical Co.,Ltd.
+86-0371-55170693 +86-19937530512 info@tianfuchem.com China 21703 55
Hefei TNJ Chemical Industry Co.,Ltd.
+86-0551-65418679 +86-18949832763 info@tnjchem.com China 2989 55
Shanghai Zheyan Biotech Co., Ltd.
18017610038 zheyansh@163.com CHINA 3620 58
career henan chemical co
+86-0371-86658258 sales@coreychem.com China 29919 58

Related articles

Related Qustion

View Lastest Price from Sodium sulfate manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
Sodium sulfate pictures 2024-03-19 Sodium sulfate
7757-82-6
US $390.00-360.00 / Tons 100Tons 99.99% 200Tons Hebei Dangtong Import and export Co LTD
Sodium sulfate pictures 2024-03-19 Sodium sulfate
7757-82-6
US $20.00-15.00 / kg 1kg 99% 20t Hebei Yime New Material Technology Co., Ltd.
Sodium sulfate pictures 2023-12-25 Sodium sulfate
7757-82-6
US $150.00-100.00 / TON 1TON 98% 1000000 Hebei Jingbo New Material Technology Co., Ltd
  • Sodium sulfate pictures
  • Sodium sulfate
    7757-82-6
  • US $390.00-360.00 / Tons
  • 99.99%
  • Hebei Dangtong Import and export Co LTD
  • Sodium sulfate pictures
  • Sodium sulfate
    7757-82-6
  • US $20.00-15.00 / kg
  • 99%
  • Hebei Yime New Material Technology Co., Ltd.
  • Sodium sulfate pictures
  • Sodium sulfate
    7757-82-6
  • US $150.00-100.00 / TON
  • 98%
  • Hebei Jingbo New Material Technology Co., Ltd

Sodium sulfate Spectrum

bisodiumsulfate Crimidesa Crude sodium sulfate dibasicsodiumsulfate Disodium monosulfate disodiummonosulfate disodiumsulfate disodiumsulphate kemol natriumsulfat[qr] Sal mirabil Sodium sulfate (2:1) sodiumsulfate(2:1) sodiumsulfate(na2so4)[qr] Sodiumsulfate,anhydrous sodiumsulfateanhydrous Sulfuric acid disodium salt Sulfuric acid, sodium salt Sulfuricacid,disodiumsalt sulfuricaciddisodiumsalt Thenardite Trona anhydrous sodium sulphate Trona salt cake SODIUM SULPHATE FINE PWDR Sodium sulfate, anhydrous, 99.99% trace metals basis Sodium sulfate, 99.995% trace metals basis Sodium sulfate anhydrous for analysis EMSURE ACS,ISO,Reag. Ph Eur Sodium sulfate anhydrous granulated for organic trace analysis EMSURE Sodium sulfate anhydrous, coarse granules for analysis 0.63 - 2.0 mm EMSURE ACS Sodium sulfate anhydrous, free-flowing, Redi-Dri, ACS reagent, >=99% Sodium sulfate anhydrous, free-flowing, Redi-Dri, ReagentPlus, >=99% SODIUM SULFATE BIOXTRA SODIUM SULFATE, ACS REAGENT, ANHYDROUS& SODIUM SULFATE, GRANULAR, 99+%. A.C.S. R SODIUM SULFATE, GRANULAR, 99+%. A.C.S. REAGENT SODIUM SULFATE, 99.99+% SODIUM SULFATE, REAGENTPLUS TM, >= 99.0% SODIUM SULFATE ANHYDROUS, PESTANAL SODIUM SULFATE ANHYDROUS ACS REAGENT SODIUM SULFATE ANHYDROUS, PH EUR SODIUM SULFATE ANHYDRE, TECHNICAL SODIUM SULFATE STANDARD SOLUTION, 0.5 M SODIUM SULFATE PLANT CELL CULTURE*TESTED SULFATE, VOLUMETRIC STANDARD, SOLUTION IN WATER SODIUM SULFATE SOLUTION 1M IN WATER* SodiumSulphateAnhydrousFcc SodiumSulphateAnhydrousUsp SodiumSulphateAnhydrousBp SodiumSulphiteAnhydrousAcs SodiumSulphateAnhydrousAr SodiumSulphateAnhydrousPurified SodiumSulphateUsp SodiumSulphateAnhydrous99% SodiumSulphiteAnhydrousBp SodiumSulphateAnhydrousAcs/Usp/Fcc SodiumSulphateAnhydrousAcs SodiumSulphiteAnhydrousPhoto SodiumSulphateAnhydrousReagent