Copper chromate

  • Cupric chromate
  • Cupric chromate(VI)
  • Copper(II) chromate
  • Chromic acid (H2CrO4), copper(2+) salt (1:1)
Formula
CuCrO4
Structure
Description
Reddish-brown crystals.
Uses
Fungicide, seed protectant, wood preservative, mordant in dyeing textiles and protecting textiles against insects and microorganisms.

Registry Numbers and Inventories.
CAS
13548-42-0
EC (EINECS/ELINCS)
236-922-7
R 43 49 50 53
S 45 53 60 61
Merck
12,2700
Canada DSL/NDSL
NDSL
US TSCA
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
CrCuO4
Formula mass
179.54
Melting point, °C
 
Boiling point, °C
 
Solubility in water
Insoluble

Hazards and Protection.
Storage
Store in cool place and out of direct sunlight. Store in well ventilated area. Store away from foodstuffs. Keep containers securely sealed and protected against physical damage.
Protection
Wear suitable protective clothing and gloves to prevent skin contact. Use chemical safety goggles. Where dust or splashing of solutions is possible, use full face shield.
Respirators
Suitable respirator. (AS 1716)
Small spills/leaks
Do NOT touch or walk through this product. Do NOT touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if safe to do so. Prevent entry into waterways, drains, confined areas. Cover with plastic sheet to minimize spreading. Absorb with earth, sand or other non-combustible material and transfer to container. DO NOT GET WATER INSIDE CONTAINERS. SEEK EXPERT ADVICE ON HANDLING AND DISPOSAL.
Decomposition
Gradually decomposes to CuCr2O4 above 400 C.

Fire.
Fire fighting
Extinguish using medium most suitable for surrounding fire. Use suitable protective equipment for surrounding fire.
Fire potential
Material does not burn.
Combustion products
Fire or heat will produce irritating, poisonous and/or corrosive gases.

Health.
Exposure limit(s)
TWA: 0.05 mg/m3 - Chromium (VI) compounds (as Cr)
Exposure effects
Repeated or prolonged skin contact may cause chronic dermatitis.
   Ingestion
Toxic if swallowed. May cause nausea and stomach cramps.
   Inhalation
Irritating to respiratory system. May cause ulceration and perforation of the nasal septum, rhinitis and pharyngitis.
   Skin
Irritating to skin. May cause sensitization by skin contact. Contact with breaks in skin may cause slow-healing 'chrome' ulcers.
   Eyes
Irritating to eyes.

First aid
 
   Ingestion
Rinse mouth thoroughly with water. If swallowed, and if more than 15 minutes from a hospital, induce vomiting, preferably using Ipecac syrup, APF. Seek immediate medical attention.
   Inhalation
Remove victim to fresh air. Employ artificial respiration if indicated. Seek medical attention.
   Skin
Wash affected areas with copious quantities of water immediately. Remove contaminated clothing and wash before re-use. Seek medical attention.
   Eyes
Immediately irrigate with copious quantity of water for at least 15 minutes. Eyelids to be held open. Seek immediate medical assistance.

Transport.