DODECYLMERCAPTAN

Chemical Identification
Chemical Identification
CAS # 112-55-0
Formula

C₁₂H₂₆S

Synonyms

1-dodecyl mercaptan; n-dodecyl mercaptan; lauryl mercaptan; n-lauryl mercaptan; 1-mercaptododecane

Physical Properties
Physical Properties
Physical description Colorless, water-white, or pale-yellow, oily liquid with a mild, skunk-like odor.
Boiling point 441-478°F Molecular weight 202.4
Freezing point/melting point 19°F Vapor pressure 3 mmHg
Flash point 190°F (open cup) Vapor density >1
Specific gravity 0.85 Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating 2 NFPA fire rating 1
NFPA reactivity rating 0 NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.)
Sampling group
Sampler/Sampling media
Sampling time*
Sampling volume (TWA)*
Sampling flow rate (TWA)*
Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments
Method reference
Notes
Special requirements

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media
Bulk Method
Bulk Method
On-Site Screening Techniques
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA REL-TWA TLV-TWA

0.1 ppm [2001]

PEL-TWA
PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C

0.5 ppm (4.1 mg/m³) [15 minutes]

TLV-C PEL-C
Skin notation

NA

Skin notation

N

Skin notation

N

Skin notation

NA

Notes:

Not established

Notes: Notes:

dermal sensitization (DSEN)

Notes:

Not established

Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: Not listed Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Lauryl mercaptan

NIOSH: Pocket Guide to Chemical Hazards - 1-Dodecanethiol

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Dodecyl mercaptan. See annual publication for most recent information.

Last Updated Date : 12/28/2020