Phosphorofluoridate alkali

Hydrolysis of D.F.P. by alkali.1 When D.F.P. was heated under reflux with an excess of n/2 sodium hydroxide solution for 30 min., and then back-titrated with n/2 sulphuric acid (phenolphthalein aa indicator), it was found that 1 mol. of the phosphorofluoridate required 2 0 mol. of sodium hydroxide. 

Hydrolysis by n/2 sodium hydroxide at room temperature, (a) Diisopropyl phosphorofluoridate (2-0532g.) was shaken with 100 ml. of 0-49 n sodium hydroxide at 17°. The oily drops disappeared after about 5 min. The shaking was continued for a total of 30 min., and then 25 ml. were withdrawn and required 13-35 ml. of 0-5n sulphuric acid for neutralization (phenolphthalein). Therefore 1 mol. of the phosphorofluoridate had reacted with 1-994 mol. of alkali. 

Di-isopropyl phosphorofluoridate (2 3355 g.) was allowed to atand in contact with 100 ml. of 0-49 n sodium hydroxide withoat shaking. After 30 min. a considerable amount of unchanged oil still remained, and titration showed that hydrolysis had proceeded tosn extent of about 16 per cent. This result is important in indicating that decontamination by cold dilute alkali is effective only en... 

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