Chromium(II) oxalate

  • Chromous oxalate
  • Ethanedioic acid, chromium(2+) salt (1:1)
  • Oxalic acid, chromium(2+) salt (1:1)
Formula
Cr(C2O4)
Structure
Description
Light green crystals.
Uses
Analytical reagent, absorption of oxygen from gas mixtures, dehydrohalogenating & reducing agent.

Registry Numbers and Inventories.
CAS
814-90-4
EC (EINECS/ELINCS)
212-410-9
Merck
12,2304
Beilstein/Gmelin
140964 (G)
RCRA
D007

Properties.
Formula
C2CrO4
Formula mass
140.02

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
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respirators
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
Small spills/leaks
Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.
Stability
Most stable of chromous salts; not appreciably oxidized by moist air hydrate.
Incompatibilities
Potentially hazardous incompatibility with water.

Fire.
Fire fighting
Respiratory protection from soluble chromic and chromous salts while fighting fires: Self-contained breathing apparatus with a full facepiece operated in pressure-demand or other positive pressure mode. Sol chromic and chromous salts (as cr)

Health.
Exposure limit(s)
IDHL: No evidence could be found for the existance of an IDLH.
Exposure effects
Increased deep tendon reflexes, drowsiness, stupor, seizures and coma may be noted. Both trivalent and hexavalent chromium have been found to cross the placental barrier in hamsters and mice. Both were shown to enter the fetus during mid to late gestation. Developmental effects caused by both differed between hamster and mice. Fetal uptake of hexavalent chromium was much greater than that of the trivalent form. Effects on placental tissue could have also affected the fetus.
   Ingestion
Persistent vomiting, hematemesis and hemorrhagic gastritis due to the corrosive action of oxalic acid on the mucous membranes may occur immediately following ingestion.
   Inhalation
Pulmonary edema, pneumoconiosis, metal fume fever, and bronchial asthma may occur.
   Skin
Dermal exposure may result in corrosive action on the skin. Skin lesions begin with epithelial cracking and the formation of slow-healing ulcers.

First aid
 
   Ingestion
Seek medical attention. If individual is drowsy or unconscious, do not give anything by mouth; place individual on the left side with the head down. Contact a physician, medical facility, or poison control center for advice about whether to induce vomiting. If possible, do not leave individual unattended.
   Inhalation
If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.
   Skin
Remove contaminated clothing. Wash exposed area with soap and water. If symptoms persist, seek medical attention. Launder clothing before reuse.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
USCG CHRIS Code
CCD