ISOPHORONE†
| CAS # | 78-59-1 |
|---|---|
| Formula |
C₉H₁₄O |
| Synonyms |
isoacetophorone; 3,5,5-trimethyl-2-cyclohexenone; 3,5,5-trimethyl-2-cyclo-hexen-1-one |
| Physical description | Colorless to white liquid with a camphor-like odor. | ||
|---|---|---|---|
| Boiling point | 419.4°F | Molecular weight | 138.21 |
| Freezing point/melting point | 17°F | Vapor pressure | 0.3 mmHg |
| Flash point | 184°F | Vapor density | 4.77 |
| Specific gravity | 0.92 | Ionization potential | 9.07 eV |
| Lower explosive limit (LEL) | 0.8% | Upper explosive limit (UEL) | 3.8% |
| NFPA health rating | 2 | NFPA fire rating | 2 |
| NFPA reactivity rating | 1 | NFPA special instruction | |
| Vapor hazard ratio (VHR) | |||
| Historical exceedance percentage | |||
| Target organs | |||
| Analyte code (IMIS no.) | 1538 | ||
|---|---|---|---|
| Sampling group | |||
| Sampler/Sampling media | ORBO™ 303 (100/50 mg) [Sigma Aldrich 20019-U] | ||
| Sampling time* | |||
| Sampling volume (TWA)* | 2-25 L |
||
| Sampling flow rate (TWA)* | 0.01-1 L/min |
||
| Sampling volume (STEL/Peak/C)* | |||
| Sampling flow rate (STEL/Peak/C)* | |||
| Analytical method instruments | GC-FID | ||
| Method reference | NIOSH 2508 (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 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 |
25 ppm (140 mg/m³) |
REL-TWA |
4 ppm (23 mg/m³) |
TLV-TWA | PEL-TWA |
4 ppm (23 mg/m³) |
|
| PEL-STEL | REL-STEL | TLV-STEL | PEL-STEL | ||||
| PEL-C | REL-C | TLV-C |
5 ppm [1992] |
PEL-C | |||
| Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
| Notes: | Notes: | Notes: | Notes: | ||||
| Health factors: See NIH-NLM PubChem. | IDLH |
200 ppm |
|||||
| Carcinogenic classifications: TLV-A3, EPA-C | Notes: | ||||||
| AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: | |||||||
Additional Resources and Literature References
|
NOAA: CAMEO Chemicals - Isophorone NIOSH: Pocket Guide to Chemical Hazards - Isophorone Literature References
|
Last Updated Date : 12/31/2020