CAS RN: 7803-51-2
UN/NA: 2199

Flammable Limits

Lower flammable limit: 1.6% by volume; Upper flammable limit: 98 (est) % by volume
Lower flammability limit of pure phosphine in moist air (0.39 vol% water vapor) at 1037 mbar was 2.1% at 10 deg C and 1.85% at 50 deg C. Presence of ammonia may tend to reduce the limit value.
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