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56-04-2

Name Methylthiouracil
CAS 56-04-2
EINECS(EC#) 200-252-3
Molecular Formula C5H6N2OS
MDL Number MFCD00006040
Molecular Weight 142.18
MOL File 56-04-2.mol

Chemical Properties

Appearance white powder
Melting point  ~330 °C (dec.)(lit.)
density  1.291 (estimate)
refractive index  1.6430 (estimate)
storage temp.  Keep in dark place,Sealed in dry,Room Temperature
solubility  DMSO (Heated), Methanol (Slightly, Heated)
form  Liquid
pka pKa 8.2 (Uncertain)
color  Clear colorless to yellow
Stability: Incompatible with strong oxidizing agents, iodine, metals.
Water Solubility  INSOLUBLE
Detection Methods HPLC
Merck  14,6128
BRN  115648
InChIKey HWGBHCRJGXAGEU-UHFFFAOYSA-N
CAS DataBase Reference 56-04-2(CAS DataBase Reference)
IARC 2B (Vol. Sup 7, 79) 2001
NIST Chemistry Reference 6-Methyl-2-thiouracil(56-04-2)
Storage Precautions Light sensitive
EPA Substance Registry System 56-04-2(EPA Substance)

Safety Data

Hazard Codes  Xn,Xi
Risk Statements 
R22:Harmful if swallowed.
R40:Limited evidence of a carcinogenic effect.
Safety Statements 
S36/37:Wear suitable protective clothing and gloves .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
RIDADR  UN 3077 9 / PGIII
WGK Germany  3
RTECS  YR0875000
Hazard Note  Irritant/Possible Carcinogen
TSCA  Yes
HS Code  29335995
Safety Profile
Confirmed carcinogen with experimental carcinogenic, neoplastigenic, tumorigenic, and teratogenic data. Poison by intraperitoneal route. Moderately toxic by ingestion. Human teratogenic and reproductive effects by an unspecified route: developmental abnormalities of the endocrine system and effects on newborn including neonatal measures or effects. Experimental reproductive effects. Used to treat hyperthyroidism. When heated to decomposition it emits very toxic fumes of NOx and SOx.
Hazardous Substances Data 56-04-2(Hazardous Substances Data)
Toxicity
MLD in rabbits (mg/kg): 2486 orally (Simon)

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