BIUREA Property

Melting point:

247-250 °C

Boiling point:

220.6°C (rough estimate)

Density 

1.6040

refractive index 

1.4462 (estimate)

storage temp. 

Sealed in dry,Room Temperature

solubility 

Sulfuric Acid (Sparingly, Heated)

pka

10.06±0.43(Predicted)

form 

Solid

color 

White to Off-White

CAS DataBase Reference

110-21-4(CAS DataBase Reference)

EPA Substance Registry System

Biurea (110-21-4)

Safety

Risk Statements 

36/37/38

Safety Statements 

24/25

TSCA 

Yes

HazardClass 

IRRITANT

HS Code 

29280000

Hazardous Substances Data

110-21-4(Hazardous Substances Data)

Toxicity

LD50 oral in rat: > 2gm/kg

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H303May be harmfulif swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

BIUREA Chemical Properties,Usage,Production

Chemical Properties

WHITE POWDER

Uses

Hydrazine-1,2-dicarboxamide is a useful compound in the process of producing protected anode active material particles for rechargeable lithium batteries.

General Description

White powder.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

BIUREA is chemically classified as an amide. Amides/imides react with azo and diazo compounds to generate toxic gases. Flammable gases are formed by the reaction of organic amides/imides with strong reducing agents. Amides are very weak bases (weaker than water). Imides are less basic yet and in fact react with strong bases to form salts. That is, they can react as acids. Mixing amides with dehydrating agents such as P2O5 or SOCl2 generates the corresponding nitrile. The combustion of these compounds generates mixed oxides of nitrogen (NOx).

Fire Hazard

The flash point of BIUREA is not available, however BIUREA is probably non-flammable.

Purification Methods

Crystallise the diamide from water, wash the crystals with EtOH then Et2O and dry in vacuum over P2O5. It does not decompose on drying at 110o /48hours. Its solubility in H2O is 1% at 0o. [Andrieth & Mohr Inorg Synth IV 26 1953, Beilstein 3 H 116, 3 I 56, 3 III 229.]