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7664-93-9

Name Sulfuric acid
CAS 7664-93-9
EINECS(EC#) 231-639-5
Molecular Formula H2O4S
MDL Number MFCD00282010
Molecular Weight 98.08
MOL File 7664-93-9.mol

Chemical Properties

Appearance Sulfuric acid is a colorless to dark brown, odorless, oily liquid which is commercially sold @ 93% to 98% H2SO4, the remainder being water.
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
Specific Gravity 1.84
Odor Odorless
PH 2.75(1 mM solution);1.87(10 mM solution);1.01(100 mM solution);
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
Water Solubility  miscible
Sensitive  Hygroscopic
Merck  14,8974
Dielectric constant 84.0(20℃)
Exposure limits TLV-TWA air 1 mg/m3 (ACGIH, MSHA, and OSHA); TLV-STEL 3 mg/m3 (ACGIH). .
LogP -1 at 25℃
Uses
Sulfuric Acid is an acidulant that is a clear, colorless, odorless liquid with great affinity for water. it is prepared by reacting sulfur dioxide with oxygen and mixing the resulting sulfur trioxide with water, or by reacting nitric oxide with sulfur dioxide in water. it is very cor- rosive. it is used as a modifier of food starch and is used in caramel production and in alcoholic beverages.
CAS DataBase Reference 7664-93-9(CAS DataBase Reference)
NIST Chemistry Reference Sulfuric acid(7664-93-9)
EPA Substance Registry System 7664-93-9(EPA Substance)

Safety Data

Hazard Codes  C,T,F,Xi
Risk Statements 
R36/38:Irritating to eyes and skin .
R35:Causes severe burns.
R39/23/24/25:Toxic: danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed .
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed .
R11:Highly Flammable.
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S30:Never add water to this product .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S36/37:Wear suitable protective clothing and gloves .
S16:Keep away from sources of ignition-No smoking .
RIDADR  UN 3264 8/PG 3
WGK Germany  1
RTECS  WS5600000
3
TSCA  Yes
HazardClass  8
PackingGroup  II
HS Code  28070010
Safety Profile
Suspected human carcinogen when contained in strong inorganic mists. A human poison. Experimental poison by inhalation. Moderately toxic by ingestion. A severe eye irritant. Extremely irritating, corrosive, and toxic to tissue, resulting in rapid destruction of tissue, causing severe burns. If much of the skin is involved, exposure is accompanied by shock, collapse, and symptoms similar to those seen in severe burns. Repeated contact with dilute solutions can cause a dermatitis, and repeated or prolonged inhalation of a mist of sulfuric acid can cause inflammation of the upper respiratory tract, leading to chronic bronchitis. Sensitivity to sulfuric acid or its mists or vapors varies with individuals. Normally 0.125-0.50 ppm may be mildly annoying, 1.5-2.5 ppm can be definitely unpleasant, and 10-20 ppm is unbearable. Workers exposed to low concentrations of the vapor gradually lose their sensitivity to its irritating action. Inhalation of concentrated vapor or mists from hot acid or oleum can cause rapid loss of consciousness with serious damage to lung tissue. Severe exposure may cause a chemical pneumonitis; erosion of the teeth due to exposure to strong acid fumes has been recopzed in industry. An experimental teratogen.Ths is a very powerful acidc oxidmer that can ignite or explode on contact with many materials, e.g., acetic acid, acetone cyanhydrin, (acetone + HNO3), (acetone + K2Cr207), acetonitrile, acrolein, acrylonitrile, (acrylonitrile + H20), (alcohols + H2O2), allyl alcohol, allyl chloride, NH4OH, 2-amino ethanol, NH4, triperchromate, anhe, (bromates + metals), BrF5, n-butyraldehyde, carbides, CoHC2, chlorates, (metals + chlorates), ClF3, chlorosulfonic acid, Cu3N, diisobutylene, (dimethyl benzylcarbinol + H204, epichlorohydrin, ethylene cyanhydrin, ethylene diamine, ethylene glycol, ethylene imine, fulminates, HCl, H2, IF7, (indene + HNO3), Fe, isoprene, LisSiz, Hg3N2, mesityl oxide, metals, (HNO3 + glycerides), p-nitrotoluene, perchlorates, HClO4, (C6H6 + permanganates), pentasilver trihydroxydiamino phosphate, (l-phenyl-2-methyl propyl alcohol + H2O2), P, P(OCN)3, picrates, potassium-tertbutoxide, KClO3, KMnO4 + KCl), (KMnO4 + H2O), p-propiolactone, RbHC2, propylene oxide, pyridine, Na, Na2CO3, NaOH, steel, styrene monomer, water, vinyl acetate, (HNO3 + toluene). When heated it emits highly toxic fumes; wdl react with water or steam to produce heat; can react with oxidizing or reducing materials. When heated to decomposition it emits toxic fumes of SOX. See also SULFATES.
Hazardous Substances Data 7664-93-9(Hazardous Substances Data)
Toxicity
LD50 orally in rats: 2.14 g/kg (Smyth)
IDLA 15 mg/m3

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