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P3H4O1S1P3H4I1N1E1S1
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PHOSPHINES is validvalid

PHOSPHINE, [n]

136,314 of 196,601 in NWL2023·also valid in CSW24

PHOSPHINE, a colorless gas analogous to ammonia, and having a disagreeable odor resembling that of garlic, also PHOSPHIN [n]

179,210 of 280,887 in CSW24·also valid in NWL2023