CARBOHYDRAZIDE

PRODUCT IDENTIFICATION
CAS NO 497-18-7

CARBOHYDRAZIDE
EINECS NO. 207-837-2
FORMULA CO(NHNH2)2
MOL WT. 90.09

H.S. CODE

 2928.00.5000

TOXICITY

  
SYNONYMS 1,3-Diaminourea; Carbonic dihydrazide; Carbazide;
1,3-Diaminomocovina; Carbazic acid hydrazide; Carbonic acid dihydrazide; Carbonohydrazide; Karbazid; 4-Amino-semicarbazide; Carbodihydrazide;
SMILES O=C(NN)NN

CLASSIFICATION

Hydrazide

EXTRA NOTES

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE

white crystalline powder

MELTING POINT

 153 - 155 C
BOILING POINT 1.02
SPECIFIC GRAVITY 1.1616

SOLUBILITY IN WATER

 very soluble
pH  
VAPOR DENSITY 3.0

AUTOIGNITION

  
log P -3.73 (Octanol-water)
OH RATE CONSTANT 2.00E-12 (cm3/molecule-sec at 25 C Atmospheric )

NFPA RATINGS

Health: 2; Flammability: 1; Instability: 2

REFRACTIVE INDEX

  
FLASH POINT

> 153 C
STABILITY Stable under ordinary conditions

EXTERNAL LINKS & GENERAL DESCRIPTION

Wikipedia Linking

Material Safety Data Sheet

The Reduction of Carbohydrazide. The Acidity of Carbohydrazide, Semicarbazide and Urea

Google Scholar Search

Chemistry of carbohydrazide and thiocarbohydrazide

Local: Carbohydrazide is an urea derivative in which both the amide groups of urea have been replaced by hydrazine residues. It is a white crystals; melting point 153 C; very soluble in alcohol and water. Chemical oxygen scavengers are used to scavenge remaining oxygen water to prevent the corrosion in the closed water system. Oxygen scavengers include several organic and inorganic types such as hydrazine, hydroquinone, diethylhydroxyethanol, oximes, and sulfites. Sulfite reacts with remaining oxygen and forms sulfate. Hydrazine reacts with remaining oxygen to generate water and nitrogen. Carbohydrazide, an analogue of hydrazine, is used to replace hydrazine which is associated safety hazards and handling precautions. Carbohydrazide can be used when thermal and pressure stability is required such as in boiler feed  system. Carbohydrazide is used as an auxiliary in photographic industry to prevent discolouration. It is used as an intermediate for pharmaceuticals, stabilizers and water treatment chemicals.
SALES SPECIFICATION

APPEARANCE

white crystalline powder

ASSAY

98.0% min

MELTING POINT

153 C min

WATER

0.5% max

ASH

0.2% max
TRANSPORTATION
PACKING 25kgs in bag
HAZARD CLASS 9 (Packing Group: III)
UN NO. 3077
SAFETY INFORMATION

GHS

 
SIGNAL WORD Warning

PICTOGRAMS

HAZARD STATEMENTS

H302:  Harmful if swallowed
H315:  Causes skin irritation
H312:  Harmful in contact with skin
H319:  Causes serious eye irritation
H335:  May cause respiratory irritation
H411:  Toxic to aquatic life with long lasting effects
H332:  Harmful if inhaled

PRECAUTIONARY STATEMENTS

P280:  Wear protective gloves/protective clothing/eye protection/face protection
P302 + P352:  IF ON SKIN: Wash with plenty of soap and water
P261:  Avoid breathing dust/fume/gas/mist/vapors/spray
P273:  Avoid release to the environment
P301+ P312:  IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
P304 + P340:  IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
P280:  Wear protective gloves/protective clothing/eye protection/face protection
P305 + P351 + P338:  IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing
EC DIRECTIVES

HAZARD CODES

XN  Harmful
N  Dangerous for the environment

RISK PHRASES

5:  Heating may cause an explosion
20/21/22:  Harmful by inhalation, in contact with skin and if swallowed
36/37/38:  Irritating to eyes, respiratory system and skin
51/53:  Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment

SAFETY PHRASES

26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
36/37/39:  Wear suitable protective clothing, gloves and eye/face protection
61:  Avoid release to the environment. Refer to special instructions / safety data sheets
PRICE INFORMATION