Copper(I) oxide

  • Dicopper oxide
  • Red copper oxide
  • Cuprous oxide
Formula
Cu2O
Structure
Description
Red-brown cubic crystals.
Uses
Fungicide.

Registry Numbers and Inventories.
CAS
1317-39-1
EC (EINECS/ELINCS)
215-270-7
EC Index Number
029-002-00-X
EC Class
Harmful
RTECS
GL8050000
RTECS class
Agricultural Chemical and Pesticide; Reproductive Effector
UN (DOT)
2392
Merck
13,2694
Beilstein/Gmelin
5480 (G)
EPA OPP
25601
Swiss Giftliste 1
G-1005
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Cu2O
Formula mass
143.09
Melting point, °C
1232
Boiling point, °C
1800
Vapor density (air=1)
4.9
Density
5.7 - 6.2 g/cm3
Solubility in water
Insoluble

Hazards and Protection.
Storage
Store in a cool, dry place. Keep container closed when not in use. Storage under a nitrogen blanket has been recommended. Store protected from moisture.
Handling
Wash thoroughly after handling. Wash hands before eating. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with skin and eyes. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Oxidizing agents, air, and moisture. Violent, potentially explosive reaction with concentrated peroxyformic acid or when heated with aluminum.
Decomposition
Irritating and toxic fumes and gases, oxides of copper.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Substance is noncombustible; use agent most appropriate to extinguish surrounding fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
The oil used in the emulsion formulations may make the preparation flammable. Cuprous oxide itself is nonflammable. It decomposes at 1800 C.
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV (as Cu, dust and mists): 1 mg/m3; (as Cu, fume: 0.2 mg/m3) (ACGIH 1996). MAK as Cu: ppm; mg/m3 1 (1996).
Poison_Class
4
Exposure effects
May cause reproductive and fetal effects.
   Ingestion
Harmful if swallowed. Causes gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
Causes respiratory tract irritation.
   Skin
Causes skin irritation. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
2392
Response guide
Hazard class
3
Packing Group
III