- Tricalcium diphosphide
Red-brown crystalline powder or gray lumps. Musty, like acetylene.
For signal fires, in purification of cu & cu alloys, as rodenticide.
Registry Numbers and Inventories.
EC Index Number
Highly flammable; Very toxic; Dangerous for the Environment
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
Odor Threshold Odor threshold 1-100 mg/m3.
2.51 g/cm3 (15 C)
Solubility in water
Hazards and Protection.
Keep dry and tightly closed.
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.
Dust respirator; protective gloves and clothing; goggles
Wear positive pressure self-contained breathing apparatus (SCBA).
Do not use water. Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Keep material dry.
Moderate - reactive only under extreme conditions.
Reacts with chlorine, chlorine monoxide, evolving phosphine. Violent reaction with Cl2, ClO, O2, Cl2, water.
Decomposed by water to phosphine, which is highly toxic.
Do not use water. Use dry chemical or carbon dioxide.
High - decomposes on contact with water evolving spontaneously combustible phosphine. Very flammable.
Can cause spontaneous ignition if wet. Contributes dense smoke of phosphoric acid.
Contributes dense smoke of phosphoric acid.
OSHA PEL FINAL: 8H TWA 0.3 PPM (0.4 MG/M3); STEL 1 PPM (1 MG/M3).
Rapid heart rate and abnormally low blood pressure may occur. Dizziness, headache, fatigue, stupor, restlessness, ataxia, seizures, and coma may be noted.
Nausea, vomiting, abdominal pain, and diarrhea may occur.
Mucous membrane irritation, shortness of breath, cough, sputum production chest tightness, dyspnea, ards, and delayed onset of pulmonary edema may occur.
Sweating and cyanosis have been seen.
Irritation of the mucous membranes may be noted.
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.
Remove to fresh air; call a physician and alert to possibility of phosphine poisoning.
Flush with water.
Flush with running water for at least 20 minutes.
USCG CHRIS Code
Std. Transport #