Chemical Datasheet

CUPRIC OXALATE

Chemical Identifiers

CAS Number	UN/NA Number	DOT Hazard Label	USCG CHRIS Code
55671-32-4 (hemihydrate) 5893-66-3 (replaced by 55671-32-4) 814-91-5	none	data unavailable	COL
NIOSH Pocket Guide		International Chem Safety Card
none		none

NFPA 704

data unavailable

General Description

Odorless bluish-white solid. Denser than water and insoluble in water. Hence sinks in water. Used as a catalysts for organic reactions.

Hazards

Reactivity Alerts

none

Air & Water Reactions

Insoluble in water.

Fire Hazard

Special Hazards of Combustion Products: Toxic carbon monoxide gas may form in fire. (USCG, 1999)

Health Hazard

Inhalation causes irritation of nose and throat. Ingestion of very large amounts may produce symptoms of oxalate poisoning; watch for edema of the glottis and delayed constriction of esophagus. Contact with eyes causes irritation. (USCG, 1999)

Reactivity Profile

CUPRIC OXALATE dissolves in aqueous ammonia and reacts as an acid to neutralize other bases as well. Can serve as a reducing agent in reactions that generate carbon dioxide.

Belongs to the Following Reactive Group(s)

Salts, Basic
Reducing Agents, Weak

Potentially Incompatible Absorbents

No information available.

Response Recommendations

Isolation and Evacuation

No information available.

Firefighting

No information available.

Non-Fire Response

No information available.

Protective Clothing

Dust mask; goggles or face shield; protective gloves (USCG, 1999)

DuPont Tychem® Suit Fabrics

No information available.

First Aid

INHALATION: remove to fresh air; if exposure has been prolonged, watch for symptoms of oxalate poisoning (nausea, shock, collapse, and convulsions).

INGESTION: give large amount of water; induce vomiting; get medical attention.

EYES: flush with water for at least 15 min.

SKIN: flush with water. (USCG, 1999)

Physical Properties

Chemical Formula:

C4Cu2O8.H2O (hemihydrate)
C2CuO4

Flash Point: data unavailable

Lower Explosive Limit (LEL): data unavailable

Upper Explosive Limit (UEL): data unavailable

Autoignition Temperature: data unavailable

Melting Point: data unavailable

Vapor Pressure: data unavailable

Vapor Density (Relative to Air): data unavailable

Specific Gravity: greater than 1 at 68°F (USCG, 1999)

Boiling Point: data unavailable

Molecular Weight: 160.6 (USCG, 1999)

Water Solubility: data unavailable

Ionization Energy/Potential: data unavailable

IDLH: data unavailable

AEGLs (Acute Exposure Guideline Levels)

No AEGL information available.

ERPGs (Emergency Response Planning Guidelines)

No ERPG information available.

PACs (Protective Action Criteria)

Chemical	PAC-1	PAC-2	PAC-3
Copper(II) oxalate (814-91-5)	7.3 mg/m3	79 mg/m3	480 mg/m3

(DOE, 2018)

Regulatory Information

EPA Consolidated List of Lists

Regulatory Name	CAS Number/ 313 Category Code	EPCRA 302 EHS TPQ	EPCRA 304 EHS RQ	CERCLA RQ	EPCRA 313 TRI	RCRA Code	CAA 112(r) RMP TQ
Copper Compounds	N100			&	313
Cupric oxalate	55671-32-4			100 pounds	313c

313c indicates that although not listed by name and CAS number, this chemical is reportable under one or more of the EPCRA section 313 chemical categories.
& indicates that no RQ is assigned to this generic or broad class, although the class is a CERCLA hazardous substance. See 50 Federal Register 13456 (April 4, 1985).

(EPA List of Lists, 2022)

CISA Chemical Facility Anti-Terrorism Standards (CFATS)

No regulatory information available.

OSHA Process Safety Management (PSM) Standard List

No regulatory information available.

Alternate Chemical Names

COPPER OXALATE
CUPRIC OXALATE
CUPRIC OXALATE HEMIHYDRATE