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TETRAHYDROFURAN†
| CAS # | 109-99-9 |
|---|---|
| Formula |
C₄H₈O |
| Synonyms |
diethylene oxide; 1,4-epoxybutane; tetramethylene oxide; THF |
| Physical description | Colorless liquid with an ether-like odor. | ||
|---|---|---|---|
| Boiling point | 151°F | Molecular weight | 72.11 |
| Freezing point/melting point | -163.3°F | Vapor pressure | 132 mmHg |
| Flash point | 6°F | Vapor density | 2.5 |
| Specific gravity | 0.89 | Ionization potential | 9.45 eV |
| Lower explosive limit (LEL) | 2% | Upper explosive limit (UEL) | 11.8% |
| NFPA health rating | 2 | NFPA fire rating | 3 |
| NFPA reactivity rating | 1 | NFPA special instruction | |
| Vapor hazard ratio (VHR) | |||
| Historical exceedance percentage | |||
| Target organs | |||
| Analyte code (IMIS no.) | 2390 |
|---|---|
| Sampling group | |
| Sampler/Sampling media | CSC tube (100/50 mg) [SKC 226-01] |
| Sampling time* | |
| Sampling volume (TWA)* | 1-9 L |
| Sampling flow rate (TWA)* | 0.01-0.2 L/min |
| Sampling volume (STEL/Peak/C)* | |
| Sampling flow rate (STEL/Peak/C)* | |
| Analytical method instruments | GC-FID |
| Method reference | NIOSH 1609 (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 Sampler/Sampling media | |
|---|---|
| Bulk Method |
| Device | Detector tube | Detector tube | Detector tube | Detector tube |
|---|---|---|---|---|
| Model/Type | Gastec 159 | Gastec 161 | Matheson-Kitagawa 8014-102SA | Matheson-Kitagawa 8014-162U |
|
Sampling information (see manufacturer instructions) |
1 or 2 strokes; 2-800 ppm range; uncertainty 25% for 50-200 ppm, 16% for 200-800 ppm | 1 stroke; approx 0.03-1.4% range; uncertainty 16% | 0.5 or 1 stroke; approx 0.01-5% range | 1 stroke; approx 5-400 ppm range |
|
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 |
200 ppm (590 mg/m³) |
REL-TWA |
200 ppm (590 mg/m³) |
TLV-TWA |
50 ppm [2002] |
PEL-TWA |
200 ppm (590 mg/m³) |
| PEL-STEL | REL-STEL |
250 ppm (735 mg/m³) |
TLV-STEL |
100 ppm [2002] |
PEL-STEL |
250 ppm (735 mg/m³) |
|
| PEL-C | REL-C | TLV-C | PEL-C | ||||
| Skin notation |
N |
Skin notation |
N |
Skin notation |
Y |
Skin notation |
N |
| Notes: | Notes: | Notes: | Notes: | ||||
| Health factors: See NIH-NLM PubChem. | IDLH |
2000 ppm |
|||||
| Carcinogenic classifications: TLV-A3 |
Notes:
10% of LEL |
||||||
|
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
100 ppm/500 ppm/5000 ppm |
|||||||
Additional Resources and Literature References
|
NOAA: CAMEO Chemicals - Tetrahydrofuran NIOSH: Pocket Guide to Chemical Hazards - Tetrahydrofuran Literature References
|
Last Updated Date : 01/13/2021