HEXACHLOROCYCLOPENTADIENE

Chemical Identification
Chemical Identification
CAS # 77-47-4
Formula

C₅Cl₆

Synonyms

HCCPD; hexachloro-1,3-cyclopentadiene; 1,2,3,4,5,5-hexachloro-1,3-cyclopentadiene; perchlorocyclopentadiene

Physical Properties
Physical Properties
Physical description Pale-yellow to amber-colored liquid with a pungent, unpleasant odor.
Boiling point 462°F Molecular weight 272.8
Freezing point/melting point 16°F Vapor pressure 0.08 mmHg at 77°F
Flash point Vapor density 9.4
Specific gravity 1.71 Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating NFPA fire rating
NFPA reactivity rating 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.) 1374
Sampling group
Sampler/Sampling media Sorbent tubes, 2 Porapak-T tubes [SKC 226-116A]
Sampling time*
Sampling volume (TWA)*

0.25 L - 90 L

Sampling flow rate (TWA)*

0.01-0.2 L/min

Sampling volume (STEL/Peak/C)*
 

 

Sampling flow rate (STEL/Peak/C)*
 

 

Analytical method instruments GC-ECD
Method reference NIOSH 2518 (fully validated)
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
 

0.01 ppm (0.1 mg/m³)

TLV-TWA
 

0.01 ppm [1990]

PEL-TWA
 

0.01 ppm (0.11 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 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 - Hexachlorocyclopentadiene

NIOSH: Pocket Guide to Chemical Hazards - Hexachlorocyclopentadiene

Literature References

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

Last Updated Date : 01/29/2021