METHYL ACETYLENE-PROPADIENE MIXTURE (MAPP)†
Chemical Identification | |
---|---|
CAS # | 59355-75-8 |
Formula |
C₃H₄ |
Synonyms |
MAPP gas; methyl acetylene-allene mixture; propadiene-methyl acetylene; propyne-allene mixture; propyne-propadiene mixture |
Physical Properties | |||
---|---|---|---|
Physical description | Colorless gas with a strong, characteristic, foul odor. | ||
Boiling point | -36 to -4°F | Molecular weight | 40.1 |
Freezing point/melting point | -213°F | Vapor pressure | >1 atm |
Flash point | Vapor density | 1.48 | |
Specific gravity | 0.576 at 59°F | Ionization potential | |
Lower explosive limit (LEL) | 3.4% | Upper explosive limit (UEL) | 10.8% |
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.) | 1652 | |||||
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 | OSHA staff, please contact the SLTC before sampling (801) 233-4900. |
|||||
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 | |
---|---|
Sampler/Sampling media |
|
Bulk Method |
---|
|
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 |
|||||
PEL-TWA |
1000 ppm (1800 mg/m³) |
REL-TWA |
1000 ppm (1800 mg/m³) |
TLV-TWA |
1000 ppm [1964] |
PEL-TWA |
1000 ppm (1800 mg/m³) |
PEL-STEL |
|
REL-STEL |
1250 ppm (2250 mg/m³) |
TLV-STEL |
1250 ppm [1964] |
PEL-STEL |
1250 ppm (2250 mg/m³) |
PEL-C |
|
REL-C |
|
TLV-C |
|
PEL-C |
|
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Notes: |
Notes:
|
Notes:
(EX) explosion hazard: the substance is a flammable asphyxiant or excursions above the TLV could approach 10% of the lower explosive limit. |
Notes:
|
||||
Health factors: See NIH-NLM PubChem. | IDLH |
3400 ppm |
|||||
Carcinogenic classifications: Not listed |
Notes:
10% of LEL |
||||||
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
|
Additional Resources and Literature References |
---|
NOAA: CAMEO Chemicals - Methylacetylene and propadiene mixture, stabilized NIOSH: Pocket Guide to Chemical Hazards - Methyl acetylene-propadiene mixture Literature References
|
Last Updated Date : 01/28/2021