87-56-9

Name Mucochloric acid
CAS 87-56-9
EINECS(EC#) 201-752-4
Molecular Formula C4H2Cl2O3
MDL Number MFCD00006966
Molecular Weight 168.96
MOL File 87-56-9.mol
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Chemical Properties

Appearance WHITE TO LIGHT BEIGE CRYSTALLINE POWDER
Melting point  125-128 °C(lit.)
Boiling point  238.75°C (rough estimate)
density  1.85
refractive index  1.4730 (estimate)
Fp  212 °F
storage temp.  Store below +30°C.
solubility  27g/l
form  Crystalline Powder
pka 0.28±0.44(Predicted)
color  White to light beige
PH 2.4 (27g/l, H2O, 20℃)
Water Solubility  SOLUBLE IN HOT WATER
Merck  14,6297
BRN  1705641
InChI 1S/C4H2Cl2O3/c5-2(1-7)3(6)4(8)9/h1H,(H,8,9)/b3-2+
InChIKey LUMLZKVIXLWTCI-NSCUHMNNSA-N
SMILES OC(=O)\C(Cl)=C(/Cl)C=O
Surface tension 72.58mN/m at 998g/L and 21℃
CAS DataBase Reference 87-56-9(CAS DataBase Reference)
NIST Chemistry Reference Mucochloric acid(87-56-9)
EPA Substance Registry System 87-56-9(EPA Substance)
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Safety Data

Symbol(GHS)  Corrosion (GHS05)Skull and Crossbones (GHS06)
GHS05,GHS06
Signal word  Danger
Hazard statements  H301-H314-H335
Precautionary statements  P260-P270-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  T,C
Risk Statements 
R25:Toxic if swallowed.
R34:Causes burns.
R37:Irritating to the respiratory system.
R42/43:May cause sensitization by inhalation and skin contact .
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S22:Do not breathe dust .
RIDADR  UN 2923 8/PG 3
WGK Germany  2
RTECS  AS7700000
TSCA  Yes
REACH Registrations Active
HazardClass  8
PackingGroup  III
HS Code  29183000
Storage Class 6.1B - Non-combustible acute toxic Cat. 1 and 2
very toxic hazardous materials
Hazard Classifications Acute Tox. 3 Oral
Eye Dam. 1
Skin Corr. 1B
STOT SE 3
Safety Profile
Poison by ingestion. Moderate skin and severe eye irritant. Questionable carcinogen with experimental tumorigenic data. Mutation data reported. When heated to decomposition it emits toxic fumes of Cl-.
Hazardous Substances Data 87-56-9(Hazardous Substances Data)
Toxicity
LD50 in rats: 0.5-1.0 g/kg orally; 10-25 mg/kg i.p., Fassett in Industrial Hygiene and Toxicology vol. II, F. A. Patty, Ed. (Interscience, New York, 2nd ed., 1962) p 1977

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