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Sulfuric acid

Sulfuric acid Basic information
Chemical properties Uses Identification test Content Analysis Toxicity Use limits Maximum allowable use & Maximum allowable residue standard of Food Additive Production method Hazards & Safety Information
Product Name:Sulfuric acid
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Mol File:7664-93-9.mol
Sulfuric acid Structure
Sulfuric acid Chemical Properties
Melting point 10°C
Boiling point ~290 °C(lit.)
density 1.840 g/mL at 25 °C(lit.)
vapor density <0.3 (25 °C, vs air)
vapor pressure 1 mm Hg ( 146 °C)
Fp 11 °C
storage temp. Store at RT.
solubility H2O: soluble
form Viscous Liquid
pka-3-2(at 25℃)
color Pale yellow to slight tan
Water Solubility miscible
Sensitive Hygroscopic
Merck 14,8974
Stability:Stable, but reacts with moisture very exothermically, which may enhance its ability to act as an oxidizing agent. Substances to be avoided include water, most common metals, organic materials, strong reducing agents, combustible materials, bases, oxidising agents. Reacts violently with water - when diluting concentrated acid, carefully and slo
CAS DataBase Reference7664-93-9(CAS DataBase Reference)
NIST Chemistry ReferenceSulfuric acid(7664-93-9)
EPA Substance Registry SystemSulfuric acid(7664-93-9)
Safety Information
Hazard Codes C,T,F,Xi
Risk Statements 36/38-35-39/23/24/25-23/24/25-11
Safety Statements 26-30-45-36/37-16
RIDADR UN 3264 8/PG 3
WGK Germany 1
RTECS WS5600000
HazardClass 8
PackingGroup II
HS Code 28070010
Hazardous Substances Data7664-93-9(Hazardous Substances Data)
MSDS Information
Sulfuric acid English
Sulfuric acid Usage And Synthesis
Chemical propertiesPure product is colorless transparent oily liquid and odorless.
Uses1. Sulfuric acid is Used in the production of chemical fertilizers, and also widely used in the chemical, medicine, plastics, dyes, petroleum refining and other industries
2. Widely used in the synthesis of dyes, explosives, drugs and so on
3. Used for batteries.
4. Commonly used as analysis reagents, dehydrating agents and sulfonating agents.
5. Used for capacity analysis and colorimetric analysis.
6. Used as dehydrating agent of organic synthesis due to its strong dehydration and oxidation properties.
7. Used as the analysis reagents, and also used for organic synthesis
8. Sulfuric acid is Mainly used for the production of phosphoric acid, phosphate, sulfate, titanium dioxide, detergents, dyes and drugs. Also used as pickling agents, sulfonation agents and dehydrating agents.
9. Used as strong acid cleaning corrosion agents, which can be used in conjunction with hydrogen peroxide.
10. Used for dye intermediates, pharmaceuticals, pesticides, plastics, chemical fiber, leather, pulp and paint. Also used as dehydrating agents and gas desiccanst.
Identification testIdentified according to GT-30 method.
Content AnalysisAdd 1ml of sample into a small conical flask that is dried to constant weight, plug the stopper, accurately weigh and then carefully add about 30ml of water. After cooling, add a few drops of methyl orange test solution (TS148) and titrate with 1mol/L hydroxide guillotine. Per milliliter of 1mol/L sodium hydroxide corresponds to 49.04 mg of sulfuric acid (H2S04).
Sulfuric acid with a concentration of less than 93.0% can be expressed with Baume (° Bé). Add approximately 200 ml of sample precooled to below 15 °C into a 250 ml specific gravity meter cylinder. Insert the appropriate Baume hydrometer with a 0.1 ° Bé scale and adjust the temperature to 15.6 °C. Record the reading of the bottom of the curved surface. Estimate to .005 ° Bé and obtain the percent concentration according to the relative density and concentration of sulfuric acid in Table 05013.
ToxicityLD502.14 g/kg (rat, oral).  GRAS (FDA, §184.1095, 2000).
Refer to industrial sulfuric acid.
Use limitsFAO/WHO (1984): food acid casein, according to GMP.
FDA §184. 1095 (2000): alcoholic beverages 0.014%; cheese 0.0003%.
Maximum allowable use & Maximum allowable residue standard of Food AdditiveChinese name of the additive Sulfuric acid
Chinese name of the food allowed to use the additive Food
Additive function   Processing auxiliaries for industrial use
Maximum allowable use (g/kg)
Maximum allowable residue (g/kg)
Normally it should be removed before the final product is made, except for those allowed specified residues.
Production method1. Distillation method: Use industrial sulfuric acid as raw materials and obtain the colorless and transparent BV-1 sulfuric acid after distillation, condensation, separation and ultra-clean filter to remove impurities.
2. Distillation method: Use industrial sulfuric acid as raw materials. Purifie the raw materials through distillation method, separate the impurities by condensation , remove the dust particle by the microporous filter membrane, and finally obtain the colorless transparent MOS grade and the low-dust and high-purity sulfuric acid.
3. At present, the domestic production of battery sulfuric acid mainly includes blowing method and distillation method. However, the foreign production method is as follows: first obtain pure sulfur trioxide from the fuming sulfuric acid of sulfuric acid plant, then introduce them into the cyclic absorption tower that use 98% sulfuric acid specially made by distilled water for absorption, and finally the high-quality battery sulfuric acid can be obtained.
4. Blowing method: put clean air with a certain pressure directly into the industrial sulfuric acid, and blow out the sulfur dioxide dissolved in sulfuric acid until the sulfuric acid is qualified for battery.
5. Distillation method: heat to transform sulfuric acid liquid into sulfuric acid vapor, and then put the sulfuric acid vapor into condenser for condensation to obtain the finished battery sulfuric acid products.
Hazards & Safety InformationCategory : Corrosive items
Toxicity classification  : high toxic
Acute toxicity :
Oral-Rat LD50: 2140 mg/kg; Inhalation-mouse LC50: 320 mg /m 3/2 h
Stimulation Data :  Eye-Rabbit 5 mg/30 sec Severe
Hazardous properties of explosives :  exploded after encounter with water; combustion-supporting after encounter with combustible; react with the metal to generate flammable explosive hydrogen
Flammable hazardous nature :  burned after encounter with organic matter; release combustible hydrogen after encounter with metal
Storage and transportation characteristics : ventilation; low-temperature; dry; stored separately with organic matter, reducing material and flammable materials
Extinguishing agent :  carbon dioxide, dry sand; prohibit the use of columnar water
Occupational Standard : TWA 1 mg /m3; STEL 3 mg /m3
Chemical PropertiesClear colorless oily liquid
DefinitionChEBI: A sulfur oxoacid that consits of two oxo and two hydroxy groups joined covalently to a central sulfur atom.
Air & Water ReactionsReaction with water is negligible unless acid strength is above 80-90% then heat from hydrolysis is extreme, may cause severe burns [Merck, 11th ed. 1989]. During sulfonation of mononitrobenzene by fuming Sulfuric acid , a leak from an internal cooling coil permitted water to enter the reaction tank. A violent eruption occurred due to the heat of solution [MCA Case History 944 1963].
Reactivity ProfileSulfuric acid is strongly acidic. Reacts violently with bromine pentafluoride [Mellor 2 Supp. 1:172 1956]. Exploded with para-nitrotoluene at 80 °C [Chem. Eng. News 27:2504]. An explosion occurred when concentrated Sulfuric acid was mixed with crystalline potassium permanganate in a vessel containing moisture. Manganese heptoxide was formed, which explodes at 70°C [Delhez 1967]. A mixture of acrylonitrile with concentrated Sulfuric acid must be kept well chilled, otherwise a vigorous exothermic reaction occurs [Chem. Safety Data Sheet SD-31:8. 1949]. Mixing Sulfuric acid (96%) in equal portions with any of the following substances in a closed container caused the temperature and pressure to increase: acetonitrile, acrolein, 2-aminoethanol, ammonium hydroxide (28%), aniline, n-butyraldehyde, chlorosulfonic acid, ethylene diamine, ethyleneimine, epichlorohydrin, ethylene cyanohydrin, hydrochloric acid (36%), hydrofluoric acid (48.7%), propiolactone, propylene oxide, sodium hydroxide, styrene monomer [NFPA 1991]. Sulfuric acid (concentrated) is extremely hazardous in contact with carbides, bromates, chlorates, fulminates, picrates, and powdered metals [Haz. Chem. Data 1966]. Allyl chloride may polymerize violently under conditions involving an acid catalyst, such as Sulfuric acid [Ventrone 1971]. React exothermically with sodium hypochlorite to produce chlorine gas. Mixing chloroSulfuric acid and 98% Sulfuric acid may evolve HCl [Subref: Anon, Loss Prev. Bull. 1977, (013), 2-3]. Zinc iodide reacts violently with H2SO4. (Pascal, 1962, Vol. 5, 168).
Health HazardCorrosive to all body tissues. Inhalation of vapor may cause serious lung damage. Contact with eyes may result in total loss of vision. Skin contact may produce severe necrosis. Fatal amount for adult: between 1 teaspoonful and one-half ounce of the concentrated chemical. Even a few drops may be fatal if the acid gains access to the trachea. Chronic exposure may cause tracheobronchitis, stomatitis, conjunctivitis, and gastritis. Gastric perforation and peritonitis may occur and may be followed by circulatory collapse. Circulatory shock is often the immediate cause of death. Those with chronic respiratory, gastrointestinal, or nervous diseases and any eye and skin diseases are at greater risk.
Fire HazardSulfuric acid is highly reactive and capable of igniting finely-divided combustible materials on contact. When heated, Sulfuric acid emits highly toxic fumes. Avoid heat; water and organic materials. Sulfuric acid is explosive or incompatible with an enormous array of substances. Can undergo violent chemical change at elevated temperatures and pressure. May react violently with water. When heated, Sulfuric acid emits highly toxic fumes. Hazardous polymerization may not occur.
Sulfuric acid Preparation Products And Raw materials
Raw materialsHydrochloric acid-->Hydrogen peroxide-->Sulfur-->Sulfur dioxide-->Sulphur-->Sulfur trioxide-->ROCK PHOSPHATE-->PYRITE-->CALCIUM SULFATE HEMIHYDRATE-->Microvoid filter film-->CHALCOPYRITE
Preparation ProductsCoumalic acid-->3,3'-DINITROBENZOPHENONE-->2-ethyl-5-nitrobenzenamine-->Methyl 3-bromo-4-methylbenzoate-->2,6-Dimethyl-3-nitropyridine-->ETHYL 3-BROMOBENZOATE-->2-NITROTHIOPHENE-4-CARBOXALDEHYDE-->Thiodiglycolic acid-->Conditioner for metal surface-->TITANIUM OXYSULFATE-->4-(N,N-Diethyl)-2-methyl-p-phenylenediamine monohydrochloride-->4-(N-Ethyl-N-2-hydroxyethyl)-2-methylphenylenediamine sulfate-->1,1'-Oxydi-2-propanol-->N,N-Diethyl-p-phenylenediamine sulfate-->Sulfosalicylic acid -->Tricobalt tetraoxide-->2-HYDROXY-4-(TRIFLUOROMETHYL)QUINOLINE-->Dispersing agent DN-->Zirconium sulfate tetrahydrate-->2-METHYL-5-NITROBENZONITRILE-->6-Fluoro-4-(trifluoromethyl)-2(1H)-quinolinone-->2-NITROTHIOPHENE-4-CARBOXYLIC ACID-->2-Amino-3,6,8-naphthalenetrisulfonic acid-->4-CHLOROMETHYL-7-METHOXY-CHROMEN-2-ONE-->TRIETHYLENETETRAMINE DIHYDROCHLORIDE-->2-Amino-5-bromo-3-nitropyridine-->2,6-DIFLUORO-4-NITROANILINE-->4-Chloro-3,5-dinitrobenzoic acid-->1-BENZOTHIOPHENE-3-SULFONYL CHLORIDE-->tert-Amylbenzene -->2-Amino-5-nitro-4-picoline-->METHYL TRICOSANOATE-->4-NITRO-2-(TRIFLUOROMETHYL)BENZOIC ACID-->6-AMINO-5-METHYLPYRIDINE-3-SULFONIC ACID-->3-BROMOQUINOLINE-8-SULFONIC ACID-->Amikacin sulfate salt-->Amikacin disulfate salt -->Sesamol-->Vat Blue BC-->Sulfur-magnesium fertilizer
Tag:Sulfuric acid(7664-93-9) Related Product Information
PERCHLORIC ACID NA Sodium sulfate Ammonium sulfate Magnesium sulfate Ferrous sulfate heptahydrate METHYL ISOCYANOACETATE BENZYL ISOCYANIDE Ethyl isocyanoacetate N-BUTYLISOCYANIDE Tosylmethyl isocyanide 1,1,3,3-TETRAMETHYLBUTYL ISOCYANIDE PHENYLSELENOL TERT-BUTYL ISOCYANIDE ASCORBICACID ACETIC ACID Citric acid Glycine