Phosphine is the compound with the chemical formula PH3. It is a colorless, flammable, toxic gas and is classed as a pnictogen hydride. Pure phosphine is odorless, but technical grade samples have a highly unpleasant odor like garlic or rotting fish, due to the presence of substituted phosphine and diphosphane (P2H4). With traces of P2H4 present, PH3 is spontaneously flammable in air, burning with a luminous flame. Phosphines are also a group of organophosphorus compounds with the formula R3P (R = organic derivative). Organophosphines are important in catalysts where they complex to various metal ions; complexes derived from a chiral phosphine can catalyze reactions to give chiral, enantioenriched products.
SEMA Gases is a manufacturer of span gases in disposable cylinder cans from the Netherlands, established from the want to create a label which is applicable for all brands of gas detection equipment. The products of SEMA Gases are used for calibration of portable gas detection instruments and calibration of fixed gas detection systems. SEMA Gases produces single gases (flammable gases, oxygen, toxic gases) and gas mixtures (2, 3, 4 or 5 gas mixtures) in various cylinder size up to 110 ltr.
Phosphine Calibration Gases
|34L||58L||110L||Cert. tol.||Prod. tol.||Stability
|0.5 ppm Phosphine // Nitrogen||Available||Available||Available||+/- 10%||+/- 20%||12|
|5 ppm Phosphine // Nitrogen||Available||Available||Available||+/- 10%||+/- 20%||12|
|10 ppm Phosphine // Nitrogen||Available||Available||Available||+/- 10%||+/- 20%||12|