Cupric oxalate

  • Ethanedioic acid, copper salt
Formula
CuC2O4
Structure
Description
Odorless bluish-white solid.
Uses
As catalyst for organic reactions, as stabilizer for acetylated polyformaldehyde, in seed treatments to repel birds and rodents.

Registry Numbers and Inventories.
CAS
814-91-5
EC (EINECS/ELINCS)
212-411-4
RTECS
RO2650000
RTECS class
Other
UN (DOT)
2449
Merck
12,2712
Beilstein/Gmelin
48412 (G)
EPA OPP
23305
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C2CuO4
Formula mass
151.57
Melting point, °C
98
Decomposition point, °C
702
Vapor pressure, mmHg
12.4 (123 C)
Density
3.01 g/cm3 (25 C)
Solubility in water
Insoluble
Thermal expansion
0.001/K
Heat of fusion
11.2 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
ELIMINATE all ignition sources. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.
Stability
No data.
Incompatibilities
Reacts as an acid to neutralize other bases as well.
Decomposition
Dangerous when heated to decomposition they emit toxic and irritating fumes oxalates.

Fire.
Fire fighting
Extinguish using agent most appropriate for surrounding fire.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
Contact with metals may evolve flammable hydrogen gas.
Combustion products
Toxic carbon monoxide gas may form in fire.

Health.
Exposure limit(s)
NIOSH REL*: TWA 1 mg/m3 OSHA PEL*: TWA 1 mg/m3 [*Note: REL and PEL also apply to other copper compounds (as Cu) except copper fume.] IDLH 100 mg/m3 (as Cu)
Exposure effects
Increased temperature may be noted in some cases. Abnormally low blood pressure may occur. Mental status may be depressed.
   Ingestion
Gastroenteritis with vomiting may occur after ingestion of some copper salts. Mucosal erosions, a metallic taste, burning epigastric sensation and diarrhea may also occur.
   Inhalation
Metal fume fever, wheezing and rales have been reported in workers exposed to fine copper dust. Dyspnea has developed after oral copper exposure. Pulmonary edema and alveolar inflammation have been noted in animals.
   Skin
Skin exposure can produce in severe irritation, itching, erythema, dermatitis and eczema; systemic toxicity may result.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Give large amount of water; induce vomiting; get medical attention.
   Inhalation
Remove to fresh air; if exposure has been prolonged, watch for symptoms of oxalate poisoning (nausea, shock, collapse, and convulsions).
   Skin
Flush with water.
   Eyes
Flush with water for at least 15 min.

Transport.
UN number
2449
Response guide
Hazard class
6.1
USCG CHRIS Code
COL