tetrakisphosphonium chloride

tetrakis(hydroxymethyl)phosphonium chloride

[¦te·trə·kəs·hī¦dräk·sē¦meth·əl·f aua′sfō·nē·əm ′klȯr‚īd]
(organic chemistry)
(HOCH2)4PCl A crystalline compound made from phosphine, formaldehyde, and hydrochloric acid; used as a flame retardant for cotton fabrics. Abbreviated THPC.