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57-56-7

Basic Information
CAS No.: 57-56-7
Name: Semicarbazide
Article Data: 110
Molecular Structure:
Molecular Structure of 57-56-7 (Semicarbazide)
Formula: CH5 N3 O
Molecular Weight: 75.0702
Synonyms: Isosemicarbazide(8CI); Aminourea; Carbamic acid, hydrazide; Carbamylhydrazine; Carbazamide;Carbazimidic acid; Hydrazine, (aminocarbonyl)-; Semicarbazide; Urea, amino-
EINECS: 200-339-6
Density: 1.286±0.06 g/cm3(Predicted)
Melting Point: 175-185oC /decomposes/
Boiling Point: 133.71°C (rough estimate)
Hazard Symbols: Xn
Risk Codes: 22
Safety: A poison by ingestion, intraperitoneal, subcutaneous, and intravenous routes. Human systemic effects by intravenous route: convulsions. Questionable carcinogen with experimental tumorigenic data. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx. See also HYDRAZINE.
PSA: 81.14000
LogP: 0.31990
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Chemistry

Chemistry informtion about Semicarbazide (57-56-7) is:
IUPAC Name: Aminourea
Synonyms: Aminomocovina ; Amino-Ure ; Carbamic Acid, Hydrazide ; Carbamicacid,Hydrazide ; Carbamoyl-Hydrazin ; Carbamylhydrazine ; Carbazamide ; Hydrazine, Carbamoyl-
MF: CH5N3O
MW: 75.07
EINECS: 200-339-6 
Density: 1.286 g/cm3
Flash Point: 66.5 °C
Boiling Point: 186.3 °C at 760 mmHg
Vapour Pressure: 0.187 mmHg at 25°C
Enthalpy of Vaporization: 49.18 kJ/mol
Following is the molecular structure of  Semicarbazide (57-56-7) is:

Uses

 Semicarbazide (57-56-7) is used as a detection reagent on thin layer chromatography (TLC). It stains α-keto acids on the TLC plate, which must then be viewed under a UV light to see the results.

Production

 Raw materials: Urea → Hydrazine Sulfate → Sodium Cyanate → Semicarbazide Hydrochloride
Preparation Products:  Hydrocortisone → 4'-Methylacetophenone → Semicarbazide Hydrochloride → Civetone → 2,6-Dihydroxypurine → Nitrofurantoin → Menthone → 3-Methylcyclopentadecanone → Mitoguazone → 4-Phenylurazole → Acetone Semicarbazone

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
man TDLo intravenous 40mg/kg (40mg/kg) Behavioral: convulsions or effect on seizure threshold Journal of Pharmacology and Experimental Therapeutics. Vol. 122, Pg. 110, 1958.
mouse LD50 intraperitoneal 123mg/kg (123mg/kg) Behavioral: convulsions or effect on seizure threshold Journal of Pharmacology and Experimental Therapeutics. Vol. 122, Pg. 110, 1958.
mouse LD50 intravenous 126mg/kg (126mg/kg) Behavioral: convulsions or effect on seizure threshold Journal of Pharmacology and Experimental Therapeutics. Vol. 122, Pg. 110, 1958.
mouse LD50 oral 176mg/kg (176mg/kg)
Behavioral: convulsions or effect on seizure threshold
Journal of Pharmacology and Experimental Therapeutics. Vol. 122, Pg. 110, 1958.
mouse LD50 subcutaneous 105mg/kg (105mg/kg)   Journal of Pharmacology and Experimental Therapeutics. Vol. 119, Pg. 444, 1957.
rat LD50 intraperitoneal 140mg/kg (140mg/kg)   Naunyn-Schmiedebergs Archiv fuer Pharmakologie und Experimentelle Pathologie. Vol. 257, Pg. 296, 1967.
rat LD50 subcutaneous 140mg/kg (140mg/kg)    

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

A poison by ingestion, intraperitoneal, subcutaneous, and intravenous routes. Human systemic effects by intravenous route: convulsions. Questionable carcinogen with experimental tumorigenic data. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx. See also HYDRAZINE.
Hazard Codes:
Xn: Harmful
Risk Statements:
R22: Harmful if swallowed.
Safety Statements:
S22: Do not breathe dust. 
WGK Germany: 3