2,6-DI-TERT-BUTYL-P-CRESOL

Chemical Identification
Chemical Identification
CAS # 128-37-0
Formula
 

C₁₅H₂₄O

Synonyms
 

BHT; butylated hydroxytoluene; dibutylated hydroxytoluene; 4-methyl-2,6-di-tert-butyl phenol

Physical Properties
Physical Properties
Physical description White to pale-yellow, crystalline solid with a slight, phenolic odor.
Boiling point 509°F Molecular weight 220.4
Freezing point/melting point 158°F Vapor pressure 0.01 mmHg
Flash point 261°F Vapor density
Specific gravity 1.05 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.) 2683
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
 

10 mg/m³

TLV-TWA
 

2 mg/m³ (inhalable fraction and vapor) [2001]

PEL-TWA
 

10 mg/m³

PEL-STEL
 

 

REL-STEL
 

 

TLV-STEL
 

 

PEL-STEL
 

 

PEL-C
 

 

REL-C
 

 

TLV-C
 

 

PEL-C
 

 

Skin notation
 

NA

Skin notation
 

N

Skin notation
 

N

Skin notation
 

N

Notes:
 

Not established

Notes:
 

 

Notes:
 

 

Notes:
 

 

Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: TLV-A4, IARC-3 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 - Butylated hydroxytoluene

NIOSH: Pocket Guide to Chemical Hazards - 2,6-Di-tert-butyl-p-cresol

Literature References

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

Last Updated Date : 12/15/2020