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Sodium bisulfite

Chemical properties Uses Identification test Content Analysis Toxicity Usage limits Production method Hazards & Safety Information
Sodium bisulfite
Sodium bisulfite
CAS No.
7631-90-5
Chemical Name:
Sodium bisulfite
Synonyms
fr-62;NAHSO3;uantaxsbs;DISULFITE;BISULFITE;PYROSULFITE;Sodium acid;Natriumdisulfit;sodiumsulhydrate;SODIUM DISULFITE
CBNumber:
CB5854257
Molecular Formula:
HNaO3S
Formula Weight:
104.06
MOL File:
7631-90-5.mol

Sodium bisulfite Properties

Melting point:
150 °C
Density 
1.48
storage temp. 
Store at RT.
solubility 
300 g/L
form 
Powder/Solid
color 
White
Water Solubility 
300 g/L
Merck 
13,8660
Stability:
Stable. Incompatible with strong oxidizing agents, strong acids.
CAS DataBase Reference
7631-90-5(CAS DataBase Reference)
EPA Substance Registry System
Sulfurous acid, monosodium salt(7631-90-5)
SAFETY
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  Xn
Risk Statements  22-31-41-52
Safety Statements  26-39-46-25
RIDADR  UN 2693
WGK Germany  1
RTECS  UX8225000
Hazardous Substances Data 7631-90-5(Hazardous Substances Data)
Symbol(GHS):
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
Precautionary statements:
P280 Wear protective gloves/protective clothing/eye protection/face protection.

Sodium bisulfite price More Price(12)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 13438 Sodium bisulfite solution purum, ~40% 7631-90-5 6x1l-r $197.8 2017-11-08 Buy
Sigma-Aldrich 13438 Sodium bisulfite solution purum, ~40% 7631-90-5 1l-r $42.2 2017-11-08 Buy
Sigma-Aldrich 13438 Sodium bisulfite solution purum, ~40% 7631-90-5 4x2.5l-r $302 2017-11-08 Buy
Sigma-Aldrich 13438 Sodium bisulfite solution purum, ~40% 7631-90-5 2.5l-r $86.9 2017-11-08 Buy
Sigma-Aldrich 243973 Sodium bisulfite ACS reagent, mixture of NaHSO 7631-90-5 2.5kg $188.5 2017-11-08 Buy

Sodium bisulfite Chemical Properties,Uses,Production

Chemical properties

white monoclinic crystal; sulfur dioxide odor; soluble in water, slightly soluble in alcohol.

Uses

1. Used as reducing agent, food preservatives and bleach.
2. Used for the bleaching of cotton fabric and organic substance. Used as reducing agents in dyes, paper, leather, chemical synthesis and other industries. Used for the production of analgin and aminopyrine intermediates in pharmaceutical industry. Used as bleach, preservatives, and antioxidants of food grade products.
3. Sodium bisulfite is reduction bleach allowed to use in China. It has bleaching effect on food and has a strong inhibitory effect on the oxidase within plant foods. It can be used for candied fruit, glucose, sugar, rock candy, caramel, candy, liquid glucose, dried fruit, dried vegetables, vermicelli, bamboo shoots, mushrooms and mushroom cans in provisions of our country, with a maximum use of 0.45g/kg; it can also be used for potato starch with a maximum use amount of 0.2g/kg and a maximume residual amount (in terms of SO2) of less than 0.03 g/kg.
4. Used as reductants in analysis and also as bleach and bacterial inhibitors
5. Used as reducing agent, antiseptic, disinfectant and bleach.

Identification test

Both sodium salt test (IT-28) and sulfite test (IT-30) are positive.

Content Analysis

Transfer 50ml of 0.1mol/L iodine solution into a flask with a stopper, and then add 200mg of accurately weighed sample and plug. After placed 5min, add 1ml of hydrochloric acid, and plus starch test solution (TS-235) as an indicator. Titrate the excess iodine with 0.1 mol/L sodium thiosulfate. Each mI of 0.1mol/L iodine solution is equivalent to 3.203mg of sulfur dioxide (SO2).

Toxicity

ADI 0~0.7mg/kg (in SO2; including SO2 and sulfites; FAO/WHO, 2001).
LD50 115 mg/k (rat, oral).
GRAS (FDA, § 182.3739, 2000).

Usage limits

GB 2760-2001 (g/kg): candied fruit, dried fruits, dried vegetables, vermicelli, glucose, sugar, rock candy, caramel, candy, liquid glucose and cans of bamboo shoots, mushrooms and mushrooms 0.45; potato starch 0.20 (Residue≤0.03); fresh glucose (tablet gasification process, in sulfite) 2.4 (residual amount calculated in SO2≤0.05, tablet packaging shall give clear indication of indicate edible)
FAO/WHO(1984): frozen shrimp, prawns, lobsters (raw product) 100mg/kg, (cooked products) 30mg/kg(in SO2); frozen french fried potatoes 50mg/kg (in SO2); pineapple juice with anti-corrosion 500 mg/kg of (in SO2; only for manufacture).
Maximum residue levels (in SO2) of Japanese provisions: dried apricots, dried peaches 2g/kg; gelatin 0.5g/kg; molasses, corn syrup 0.3g/kg; fruit wine 0.35g/kg; shrimp 0.1mg/kg.
When applied to dry fruit, sodium bisulfite can be prepared into 0.2% to 3% solution to take dipping or spraying.
FDA, § 182.3739 (2000): shall not be used for meat, vitamin B and source food.
EEC (1990): mainly for the preservation of alcoholic beverages.

Production method

Add sodium sulphite mother liquor (containing NaHSO3 40%, Ph value of 3 to 4) slowly into soda ash to generate sodium sulfite solution (to the slurry Ph value of 7~8 for the end); transfer the above sodium sulfite solution into series reactors (2 to 3) to absorb the SO2 gas (10% to 13%) from the combustion of sulfur, forming sodium bisulfite (to the reaction temperature no longer rising for the end). In the reaction process, a large number of crystals precipitate out, which is centrifuged to obtain the wet goods with moisture content of 6% to 10%, and then dehydrated by air drying at 250 to 300 ° C to make the final products.
2NaHSO3 + Na2CO3 → 2Na2SO3 + H2O + CO2↑
NaSO3+H2O→2NaHSO3
Absorb sulfur dioxide from the gas of sulfuric acid production with soda ash solution to generate sodium bisulfite. After further centrifugal separation and air drying at 250~300 ° C, the final sodium bisulfite is obtained.
Na2CO3 + 2SO2 + H2O → 2NaHSO3 + CO2↑

Hazards & Safety Information

Category: Corrosive items
Toxicity classification: moderate toxicity
Acute Toxicity: Oral-Rat LD50: 2000 mg/kg; Abdominal-Mouse LD50: 675 mg/kg
Flammable hazardous characteristics :
The products can decompose into sulfur oxides when meeting heat;
Aqueous solution is alkaline and corrosive.
Storage and transportation characteristics :
Storehouse should be low-temperature, well-ventilated and dry.
Fire extinguishing agent: much water
Occupational Standard: TWA 5mg /m3; TWA 5 mg/m3

Chemical Properties

white powder

Uses

Reducing agent; convenient source of sulfur dioxide.

General Description

White crystals or crystalline powder. Slight sulfurous odor. Specific gravity 1.48. Strong irritant to skin and tissue.

Air & Water Reactions

Water soluble.

Reactivity Profile

Sodium bisulfite is a reducing agent. Emits highly toxic gaseous sulfur dioxide gas when heated to decomposition or on contact with mineral acids [Sax, 9th ed., 1996, p. 2949].

Health Hazard

Powder is irritating to eyes, nose, and throat and can irritate skin. Ingestion may cause irritation of stomach. Very large doses cause violent colic, diarrhea, depression, and death.

Fire Hazard

Flammable/combustible material. May ignite on contact with moist air or moisture. May burn rapidly with flare-burning effect. Some react vigorously or explosively on contact with water. Some may decompose explosively when heated or involved in a fire. May re-ignite after fire is extinguished. Runoff may create fire or explosion hazard. Containers may explode when heated.

Sodium bisulfite Preparation Products And Raw materials

Raw materials

Preparation Products


Sodium bisulfite Suppliers

Global( 253)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Shanghai Aladdin Bio-Chem Technology Co.,LTD 021-20337333/400-620-6333
021-50323701 sale@aladdin-e.com China 25125 65
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933 jkinfo@jkchemical.com;market6@jkchemical.com China 96831 76
Meryer (Shanghai) Chemical Technology Co., Ltd. +86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
+86-(0)21-61259102(Shanghai) +86-(0)755-86170066(ShenZhen) +86-(0)10-88580358(Beijing) sh@meryer.com China 40403 62
Beijing dtftchem Technology Co., Ltd. 13651141086; 86(10)60275028、60275820
86 (10) 60270825 dtftchem@sina.com China 1443 62
BeiJing Hwrk Chemicals Limted 4006990298;010-57411839;0757-86311057;021-51691807
010-87653215;0757-86311057;021-55236763 sales@hwrkchemical.com China 15554 55
Beijing Ouhe Technology Co., Ltd +86-10-4006331231;+86-10-51280831;+86-10-82967028
+86-10-82967029 sales@ouhechem.com China 10816 60
JinYan Chemicals(ShangHai) Co.,Ltd. 13817811078,021-50426030
86-021-50426522,50426273 sales@jingyan-chemical.com China 10094 60
Secco work (Beijing) chemical technology co., LTD 010-69755668;
010-69755668 1139670422@qq.com China 3549 54
Adamas Reagent, Ltd. 400-600-9262
bxy@titansci.com China 14021 59
Shanghai Hanhong Scientific Co.,Ltd. 021-54306202,021-54302127,021-54308259,13764082696
+86-21-54291107 jerry.ma@hanhonggroup.com China 28718 64

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