METHYL ACETYLENE-PROPADIENE MIXTURE (MAPP)†
| CAS # | 59355-75-8 |
|---|---|
| Formula |
C₃H₄ |
| Synonyms |
MAPP gas; methyl acetylene-allene mixture; propadiene-methyl acetylene; propyne-allene mixture; propyne-propadiene mixture |
| 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 | |||
| 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) 233-5100. |
| 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 Sampler/Sampling media | |
|---|---|
| Bulk Method |
| Device | |||||
|---|---|---|---|---|---|
| Model/Type | |||||
|
Sampling information (see manufacturer instructions) |
|
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 : 01/22/2024