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67-21-0

Name DL-ETHIONINE
CAS 67-21-0
EINECS(EC#) 200-647-0
Molecular Formula C6H13NO2S
MDL Number MFCD00063102
Molecular Weight 163.24
MOL File 67-21-0.mol
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Chemical Properties

Appearance Off-White Solid
Melting point  265-268 °C
alpha  [α]D20 0±0.5° (c=5, dil. HCl)
Boiling point  310℃
density  1.164
refractive index  1.5500 (estimate)
Fp  142℃
storage temp.  −20°C
form  Crystalline Powder or Flakes
pka 2.23±0.10(Predicted)
color  White to off-white
Water Solubility  Soluble in water.
Merck  14,3738
BRN  1722529
CAS DataBase Reference 67-21-0(CAS DataBase Reference)
EPA Substance Registry System S-Ethylhomocysteine (67-21-0)

Safety Data

Hazard Codes  Xi
Risk Statements 
R36/37/38:Irritating to eyes, respiratory system and skin .
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
WGK Germany  3
RTECS  ES6825200
TSCA  Yes
HS Code  29309090
Safety Profile
Mddly toxic by ingestion and intraperitoneal routes. Suspected carcinogen with experimental carcinogenic and tumorigenic data. An experimental teratogen. Experimental reproductive effects. Mutation data reported. When heated to decomposition it emits toxic fumes of SOx and NOx.
Toxicity
The Sethyl analog of methionine. It is a carcinogen and hepatotoxic agent once proposed as an antineoplastic agent. It inhibits the incorporation of methionine and glycine into proteins and substitutes for methionine in transmethylation reactions, the ethyl group appearing in the products in place of the methyl groups of methionine (e.g., ethylcholine is formed instead of choline). Ethionine is currently used only as an experimental compound in studies of hepatotoxicity and methionine metabolism and nutrition.

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