TUNGSTEN, METAL & INSOLUBLE COMPOUNDS (as W)†
| CAS # | 7440-33-7 |
|---|---|
| Formula |
W |
| Synonyms |
tungsten metal; wolfram. Synonyms vary depending upon the specific insoluble tungsten compound. |
| Physical description | Hard, brittle, steel-gray to tin-white solid. | ||
|---|---|---|---|
| Boiling point | 10,701°F | Molecular weight | 183.9 |
| Freezing point/melting point | 6170°F | Vapor pressure | 0 mmHg (approx) |
| Flash point | Vapor density | ||
| Specific gravity | 19.3 | 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 | |||
| Analyte code (IMIS no.) | 2536 | ||
|---|---|---|---|
| Sampling group | |||
| Sampler/Sampling media | Pre-assembled cassette with mixed cellulose ester filter (MCEF) 0.8 micron (25 or 37 mm) [MAWP025A0 or MAWP037A0] | ||
| Sampling time* | 240 min |
||
| Sampling volume (TWA)* | 480 L |
||
| Sampling flow rate (TWA)* | 2 L/min |
||
| Sampling volume (STEL/Peak/C)* | 30 L |
||
| Sampling flow rate (STEL/Peak/C)* | 2 L/min |
||
| Analytical method instruments | ICP | ||
| Method reference | OSHA ID-213 (fully validated) | ||
| Notes | Results are provided for the presence and amount or concentration of a specific element or elements. The stated identity of the actual sample contents (such as specific form, valence state, or compound) is based on the assumption that the material sampled is as identified by the compliance officer using available documentation of materials and processes. |
||
| 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 | Wipe with Whatman smear tab. [WHA1450993] |
|---|---|
| Bulk Method | Available |
| 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 |
5 mg/m³ (Construction and Maritime only) |
REL-TWA |
5 mg/m³ |
TLV-TWA |
3 mg/m³ (respirable particulate matter): Tungsten [7440-33-7] and compounds, in the absence of Cobalt, as W [2016]. 0.005 mg/m³ (thoracic particulate matter): Hard metals containing Cobalt [7440-48-4] and Tungsten carbide [12070-12-1], as Co [2015]. |
PEL-TWA |
5 mg/m³ |
| PEL-STEL | REL-STEL |
10 mg/m³ |
TLV-STEL | PEL-STEL |
10 mg/m³ |
||
| PEL-C | REL-C | TLV-C | PEL-C | ||||
| Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
|
Notes:
The OSHA PEL applies to Construction and Maritime Industries only. See 29 CFR 1926.55 Table 1 and 29 CFR 1915.1000 Table Z-Shipyards. |
Notes:
The REL also applies to other insoluble tungsten compounds (as W). |
Notes:
respiratory sensitization (RSEN) |
Notes: | ||||
| Health factors: See NIH-NLM PubChem. | IDLH | ||||||
| Carcinogenic classifications: | Notes: | ||||||
| AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: | |||||||
Additional Resources and Literature References
|
NOAA: CAMEO Chemicals - Tungsten NIOSH: Pocket Guide to Chemical Hazards - Tungsten Literature References
|
Last Updated Date : 06/08/2022