Detail of "142-81-4"

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Interactions between sodium chondroitin sulfate C and organic salts in aqueous solutions

Interactions between sodium chondroitin sulfate C and organic salts in aqueous solutions. Sakai, Tomoo; Sakurai, Masao; Harada, Shigeharu; Komatsu, Tsuyoshi; Nakagawa, Tsurutaro (Fac. Sci., Hokkaido Univ., Sapporo, Japan). Nippon Kagaku Kaishi, (10), 1602-7 (Japanese) 1976. CODEN: NKAKB8. DOCUMENT TYPE: Journal CA Section: 6 (General Biochemistry) The interactions between Na chondroitin sulfate C (Ch-Na) and org. salts were studied by viscometry, potentiometric titrn., pptn. expt., and conductometry. The org. salts used in this study were Me (MACl), Et (EACl), Bu (BACl), hexyl- (HACl), octyl- (OACl), decyl- (DeACl), and dodecyltrimethylammonium chloride (DTACl). The lowering of the reduced viscosity of Ch-Na or the apparent pKa of the corresponding polyacid due to the added salts is in the following order: MACl > EACl > BACl > HACl > OACl, and DTACl > DeACl > OACl.Several substances with their cas registry numbers 142-81-4 and 557-66-4 may be metioned in this study. The exptl. results are interpreted in terms of the hydrophilic-hydrophobic balance of the org. salts. For the org. salts having alkyl group shorter than that in HACl, the salt effect is mainly due to electrostatic interaction. The tendency of hydrophobic interaction between the org. salts and the polyion becomes a dominant factor in the case of longer-chain salts. The interpretation was confirmed by pptn. and elec. conductance measurements. .