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Chemical Sampling Information (CSI)
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General Description

Synonyms: Isopropanethiol; 2-Propanethiol; 2-Mercaptopropane

OSHA IMIS Code Number: S248

Chemical Abstracts Service (CAS) Registry Number: 75-33-2

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: TZ7302000; 66102

Chemical Description and Physical Properties:

molecular weight: 76.17
molecular formula: C3H8S
boiling point: 51-55°C

Monitoring Methods used by OSHA

Articles: Nishikawa, Yoshinori; Kuwata, Kazuhira. "Analytical Chemistry" 57, 1985, pp1864-8. ...Title: Liquid Chromatographic Determination of Low Molecular Weight Alkylthiols in Air via Derivatization with NBD-Chloride. (7-Chloro-4-Nitro-2,1,3-Benzoxadiazole) ...Collection: Sep-PAK Florisil coated with NBD-Cl (Tubes used in OME 40 NBD-CL on XAD-7 may work) Air Vol and FLowrate: 100L at 0.8-1.2L/min ...Analysis: 2 mL of MeOH were used to dynamically desorb the derivative. The samples stood at room temp. for 15 minutes before analysis by HPLC. ...Column: Develosil ODS-3 10cmx4mm at 30°C Eluent: 45/55 acetonitrile/water at 1 mL/min. ...Detector: UV at 425nm or fluorescent at 425nm excitation and 510nm emission. Mercaptans studied: Methyl, ethyl, isopropyl, propyl, 2-methyl-2-propyl, 2-butyl, 2-methyl-1-propyl, and 1-butyl

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