PHYSICAL CHEMISTRY Composition A mixture of emamectin B1a (90%) and emamectin B1b (10%), as their benzoate salts. Mol. wt. 1008.3 (B1a); 994.2 (B1b) M.f. C56H81NO15 (B1a); C55H79NO15 (B1b) Form White to off-white powder. M.p. 141-146 V.p. 4 10-3 ATXht981131 mPaATXht0 (21 ) KOW logP = 5.0 (ATXht981151 pHATXht0 7) S.g./density 1.20 (23 ) Solubility In water 0.024 g/l (ATXht981151 pHATXht0 7, 25).
