DICROTOPHOS

Chemical Identification

CAS # 141-66-2
Formula

C₈H₁₆NO₅P

Synonyms

Bidrin; Carbicron; 2-dimethyl cis-2-dimethylcarbamoyl-1-methylvinylphosphate

Physical Properties

Physical description Yellow-brown liquid with a mild, ester odor.
Boiling point 752°F Molecular weight 237.2
Freezing point/melting point Vapor pressure 0.0001 mmHg
Flash point >200°F Vapor density
Specific gravity 1.22 at 59°F 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

Analyte code (IMIS no.) 0902
Sampling group
Sampler/Sampling media OSHA versatile sampler (OVS-2) - 13 mm XAD-2 tube (270/140 mg) with GFF enclosed [SKC 226-30-16]
Sampling time*
Sampling volume (TWA)*

480 L

Sampling flow rate (TWA)*

1 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments GC-FPD
Method reference OSHA PV2099 (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.

Bulk/Wipe Method

Wipe Sampler/Sampling media

Wipe with GFF (37 mm), Type A/E [AP4003705]

Bulk Method

Limit the amount of bulk submitted to 1 g or 1 mL.

On-Site Screening Techniques

Device
Model/Type
Sampling information
(see manufacturer instructions)

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

0.25 mg/m³

TLV-TWA

0.05 mg/m³ (inhalable fraction and vapor) [1998]

PEL-TWA

0.25 mg/m³

PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C PEL-C
Skin notation

NA

Skin notation

Y

Skin notation

Y

Skin notation

Y

Notes:

Not established

Notes: Notes:

dermal sensitizer (DSEN), BEI®

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

Last Updated Date : 12/28/2020