Calcium phosphide

  • Photophor
  • Tricalcium diphosphide
Formula
Ca3P2
Structure
Description
Red-brown crystalline powder or gray lumps. Musty, like acetylene.
Uses
For signal fires, in purification of cu & cu alloys, as rodenticide.

Registry Numbers and Inventories.
CAS
1305-99-3
EC (EINECS/ELINCS)
215-142-0
EC Index Number
015-003-00-2
EC Class
Highly flammable; Very toxic; Dangerous for the Environment
RTECS
EW3870000
UN (DOT)
1360
Merck
12,1742
Beilstein/Gmelin
9552 (G)
EPA OPP
66503
Swiss Giftliste 1
G-1352
Canada DSL/NDSL
NDSL
US TSCA
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Ca3P2
Formula mass
182.18
Melting point, °C
0.16
Odor Threshold Odor threshold 1-100 mg/m3.
Density
2.51 g/cm3 (15 C)
Solubility in water
Decomposes

Hazards and Protection.
Storage
Keep dry and tightly closed.
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
Dust respirator; protective gloves and clothing; goggles
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Do not use water. Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Keep material dry.
Stability
Moderate - reactive only under extreme conditions.
Incompatibilities
Reacts with chlorine, chlorine monoxide, evolving phosphine. Violent reaction with Cl2, ClO, O2, Cl2, water.
Decomposition
Decomposed by water to phosphine, which is highly toxic.

Fire.
Fire fighting
Do not use water. Use dry chemical or carbon dioxide.
Fire potential
High - decomposes on contact with water evolving spontaneously combustible phosphine. Very flammable.
Hazards
Can cause spontaneous ignition if wet. Contributes dense smoke of phosphoric acid.
Combustion products
Contributes dense smoke of phosphoric acid.
 
Special
W

Health.
Exposure limit(s)
OSHA PEL FINAL: 8H TWA 0.3 PPM (0.4 MG/M3); STEL 1 PPM (1 MG/M3).
Poison_Class
1
Exposure effects
Rapid heart rate and abnormally low blood pressure may occur. Dizziness, headache, fatigue, stupor, restlessness, ataxia, seizures, and coma may be noted.
   Ingestion
Nausea, vomiting, abdominal pain, and diarrhea may occur.
   Inhalation
Mucous membrane irritation, shortness of breath, cough, sputum production chest tightness, dyspnea, ards, and delayed onset of pulmonary edema may occur.
   Skin
Sweating and cyanosis have been seen.
   Eyes
Irritation of the mucous membranes may be noted.

First aid
 
   Ingestion
The possible benefit of early removal of some ingested material by cautious gastric lavage must be weighed against potential complications of bleeding or perforation. Activated charcoal activated charcoal binds most toxic agents and can decrease their systemic absorption if administered soon after ingestion. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
   Inhalation
Remove to fresh air; call a physician and alert to possibility of phosphine poisoning.
   Skin
Flush with water.
   Eyes
Flush with running water for at least 20 minutes.

Transport.
UN number
1360
Response guide
Hazard class
4.3
PRTC
T
Packing Group
I
 
USCG CHRIS Code
CPP
 
Std. Transport #
4916310