Chloride, hexadecylpyridinium

An automated vapor pressure method has been used to obtain highly precise values of the partial pressure of benzene as a function of concentration in aqueous solutions of sodium dodecylsulfate (at 15 to 45 C) and 1-hexadecylpyridinium chloride (at 25 to 45 C). Solubilization isotherms and the dependence of benzene activity on the intramicellar composition are inferred from the measurements and related to probable micellar structures and changes in structure accompanying the solubilization of benzene. Calculations are made to determine the efficiency of micellar-enhanced ultrafiltration (MEUF) as a process for purifying water streams contaminated by benzene,... 

The present report describes new results for benzene at temperatures in the range 15 to 45°C, solubilized in aqueous solutions of sodium dodecylsulfate (SDS) and 1-hexadecylpyridinium chloride (referred to as cetylpyridinium chloride or CPC). The solute activity vs. concentration data provide insight into the nature of chemical and structural effects responsible for the solubilization of benzene by aqueous micellar systems in addition, the results find direct use in predicting the performance of MEUF in removing dissolved benzene from aqueous streams. 

The benzene used was Analytical Reagent Grade from Mallinckrodt Chemical Company, distilled through a 25-plate bubble-cap column and stored in vapor contact with desiccant prior to use. High-quality 1-hexadecylpyridinium chloride (CPC) from Hexcel Corporation was used without further purification. Sodium dodecylsulfate (SDS) was HPLC-grade chemical from Fisher Scientific Company, purified by recrystallization from an ethanol-water mixture. 

Table I lists experimental results, comprising derived values of the fugacity of benzene at known total molarity in the aqueous phase, [B], and known molarity of 1-hexadecylpyridinium chloride [CPC] or sodium dodecylsulfate [SDS]. Fugacities have been calculated from total pressures by subtracting the vapor pressure of the aqueous solution in the absence of benzene from the measured total pressure and correcting for the small extent of nonideality of the vapor phase (15, 22). Results are given for temperatures varying from 25 to 45°C for the CPC systems and 15 to 45°C for the SDS systems.

Table I. Benzene fugacities above aqueous solutions containing known concentrations of benzene and 1-hexadecylpyridinium chloride (CPC) at temperatures varying from 25 to 45° C...

Proprietary Names. Ceepryn Cepacol Dobendan Merocet(s). It is an ingredient of Merocaine and Tyrosolven. 1-Hexadecylpyridinium chloride monohydrate C2iH38C1N,H2O = 358.0... 

CEPRIM CETAMIUM CETYLPYRIDINIUM CHLORIDE N-CETYLPYRIDINIUM CHLORIDE 1-CETYLPYRIDINIUM CHLORIDE DOBENDAN HEXADECYLPYRIDINIUM CHLORIDE n-HEXADE-CYLPYRIDINIUM CHLORIDE 1-HEXADECYLPYRIDINIUM CHLORIDE INTEXSAN CPC PRISTACIN... 

HEX. DECYL 2-ETHYI.HEXANOATE see HCP550 HEXADECYLIC ACID see PAE250 HEXADECYXPYRIDINIUiM CHLORIDE see CCXOOO 1-HEXADECYLPYRIDINIUM CHLORIDE see CCXOOO n-HEXADECYLPYRIDINIUM CHLORIDE see CCXOOO HEXjVDECYLTRICHLOROSILANE see HCQOOO HEXADECYXTRIMETHYLAMMONIUiM BROMIDE see HCQ500... 

C16-alkylpyridinium chloride Cepacol Cepacol chloride Cetamiun cetyl pyridium chloride Dobendan hexadecylpyr-idinium chloride 1-hexadecylpyridinium chloride Medilave Pristacin Pyrisept. 

Cerilpyridiniutii chloride is the 1-hexadecylpyridinium chloride (USP/NF-. Eur.Ph.-, BP-, and Martindate-compliant). Lin et al. (33) compared the primaiy ocular and dermal irritations of several quaternary ammonium compounds. They concluded that the irritancy of these compounds is likely to be related to their solubility in addition to their cationic characteristics. Only celylpyridinium chloride is very soluble in both lipids and w er. It appears that not all of the quaternary ammonium compounds studied are irritant, but celylpyridinium chloride was severely irritating to the skin of the test animal. In a recent work. Green et al. (34) confirmed that ophthalmic medications containing celylpyridinium chloride are potentially hazardous to the comeal endothelium. 

Cetylpyridinium chloride CPC Hexadecylpyridinium chloride 1-Hexadecylpyridinium chloride n-Hexadecylpyridinium chloride... 

Hexadecylpyridine bromide Hexadecylpyridinium bromide. See Cetylpyridiniurn bromide Hexadecylpyridinium chloride 1-Hexadecylpyridinium chloride n-Hexadecylpyridinium chloride. See Cetyl pyridini urn chloride Hexadecyl sodium sulfate. See Sodium cetyl sulfate... 

QUATERNARY AMMONIUM AND PHOSPHONIUM COMPOUNDS 18.1.8. 1-Hexadecylpyridinium chloride monohydrate C21H38CIN-H2O... 

Hexadecylpyridinium chloride Dimethyl gentian violet 5-Chloro-2-(2,4-dichlorophenoxy)phenol Biguanide compounds Poly(vinylpyrrolidone) iodine complexes e-Poly(lysine) (8)... 

Heptafluorobutyl methacrylate, 66 n-Heptane, 198, 216 Hexabromocyclododecane, 74, 75 Hexachlorocyclopentadiene, 242 Hexachloroendomediylenetetrahydrophthalic add, 81 Hexadecyl-3,5-di-ferf-butyl-4-hydroxybenzoate, 194 1-Hexadecylpyridinium chloride, 63 Hexafluoroethane, 203 Hexafluoropropylene, 32 Hexahydrophdialic anhydride, 13 Hexamethylenetetramine, 199 n-Hexane, 198, 218... 

Hexadecylpyridinium chloride 1-Hexadecylpyridinium chloride n-Hexade-cylpyridinium chloride. See Cetylpyridinium chloride Hexadecyl sodium sulfate. See Sodium cetyl sulfate Hexadecyl stearate n-Hexadecyl stearate. See Cetyl stearate Hexadecyl (sulfophenoxy) benzenesulfonic acid, disodium salt See Sodium hexadecyl diphenyl disulfonate Hexadecyl tetradecanoate. See Cetyl myristate Hexadecyltrimethylammonium bromide. See Cetrimonium bromide Hexadecyl trimethyl ammonium chloride. See Cetrimonium chloride Hexadecyl trimethyl ammonium p-toluene sulfonate. See Cetrimonium tosylate Hexadienic acid Hexadienoic acid 2/4-Hexadienoic acid. See Sorbic acid 2/4-Hexadienoic acid potassium salt. See Potassium sorbate Hexaethylene glycol. See PEG-6... 

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