CYANOGEN†

Chemical Identification
Chemical Identification
CAS # 460-19-5
Formula

C₂N₂

Synonyms

carbon nitride; dicyan; dicyanogen; ethanedinitrile; oxalonitrile

Physical Properties
Physical Properties
Physical description Colorless gas with a pungent, almond-like odor.
Boiling point -6°F Molecular weight 52.0
Freezing point/melting point -18°F Vapor pressure 5.1 atm at 70°F
Flash point Vapor density 1.82
Specific gravity 0.95 (liquid at -6°F) Ionization potential 13.57 eV
Lower explosive limit (LEL) 6.6% Upper explosive limit (UEL) 43%
NFPA health rating 4 NFPA fire rating 4
NFPA reactivity rating 1 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.) 0800
Sampling group
Sampler/Sampling media XAD-2 tube (120/60 mg) coated with 10% 2-(hydroxymethyl)piperidine [SKC 226-118]
Sampling time*
Sampling volume (TWA)*

12 L

Sampling flow rate (TWA)*

0.2 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments GC-NPD
Method reference OSHA PV2104 (partially 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

10 ppm (Construction and Maritime industries only)

REL-TWA

10 ppm (20 mg/m³)

TLV-TWA PEL-TWA

10 ppm (20 mg/m³)

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

5 ppm [2015]

PEL-C
Skin notation

N

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

There is no General Industry PEL for Cyanogen. See 29 CFR 1926.55 Appendix A and 29 CFR 1915.1000 Table Z-Shipyards.

Notes: Notes: Notes:
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 - Cyanogen

NIOSH: Pocket Guide to Chemical Hazards - Cyanogen

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Cyanogen. See annual publication for most recent information.
  • EPA Air Toxics Website: Cyanide Compounds. U.S. Environmental Protection Agency Technology Transfer Network.
  • Albin, R.L.: Basal ganglia neurotoxins. Neurol. Clin. 18(3): 665-680, 2000.
  • Lewis, T.R., Anger, W.K. and Te Vault, R.K.: Toxicity and evaluation of sub-chronic exposures to cyanogen in monkeys and rats. J. Environ. Pathol. Toxicol. Oncol. 5(4-5):151-163, 1984.
  • Pohanish, R.P. (editor): Cyanogen. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 702-704.

Last Updated Date : 12/22/2020