Hydrochloric Acid → HCID 86735500, compound

Participants

Reaction Steps

80.5 g of 3,5-di-tert. butyl-4-hydroxybenzyl-phosphonic acid di-n-octadecyl ester are dissolved in 250 ml of carbon tetrachloride and the solution is treated briefly with hydrogen chloride gas. The chlorination is effected by carefully bubbling in 10.5 g of chlorine gas for 3 hours at -5° C. The reaction mixture is allowed to come to room temperature and after stirring for a further 3 hours the solvent is removed in vacuo. The oily residue is digested with acetonitrile to purify the reaction product and the cyrstalline precipitate is isolated. The product is further purified by recrystallisation from aqueous ethylene glycol monomethyl ether. The resultant 3-chloro-5-tert. butyl-4-hydroxybenzyl-phosphonic acid di-n-octadecyl ester (stabiliser 3) forms white crystals with a melting point of 55° C.

Provenance & Evidence