Phosphine (PH3) is to exterminate insects and be released from the following reaction:
AlP (Aluminium Phosphide) + 3H2O (Humidity) = PH3 (Phosphine) + Al(OH)3
Phostoxin, Gastoxin, Quick Phos, Celphos…are trade names of products by different producers with main active ingredient Aluminium Phosphide 56%. As usual, in fumigation, every 3 grams of AlP making 1 gram of PH3 in adequate exposure time for the reaction. In practice, up to words noted in the contract or L/C, the fumigation company will make document and issue adequate certificate. Therefore, fumigants as Aluminium Phosphide (6 g/m3) or Phosphine (2 g/m3) are legal in accordance with L/C or contract