PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Silver nitrite; (Silver(I) nitrite) | 7783-99-5 |
15.01
11.01
15.02
4.01
4.08
7.01
11.00
4.09
4.06
4.04
|
||||||||||
| Formula | Synonyms | |||||||||||
| Ag-NO2 | ||||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 153.874 | S |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.043 | 4.8 | 29 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.0068 | 0.76 | 4.6 |
Technical Basis
A review of available sources did not identify exposure limits or acute toxicity for silver nitrite. Instead, exposure limits for soluble silver compounds (IDLH, TWAs, CASRN: 7440-22-4) were evaluated. Data sources were selected according to the hierarchy listed in Table 3.1. The IDLH (1990) was selected as the TEEL-3. The TLV-TWA was selected as the TEEL-1 basis. A compound adjustment factor was applied to both exposure limits (Section 3.2.2).
• TEEL-1 = MW-adjusted TLV-TWA (soluble silver compounds, CASRN: 7440-22-4; 0.01 mg/m3) x 3
• TEEL-2 = TEEL-3/6
• TEEL-3 = MW-adjusted IDLH (1990, soluble silver compounds, CASRN: 7440-22-4; 20 mg/m3)
This review generated TEEL-3 and TEEL-2 values inconsistent with Rev. 29A. The Rev. 29A and current TEEL-1 values, source, and methodology are consistent. The Rev. 29A TEEL-3 and TEEL-2 values were derived from the TEEL-1, while the current TEEL-3 is a molecular weight adjusted IDLH from which the TEEL-2 was derived.
• TEEL-1 = MW-adjusted TLV-TWA (soluble silver compounds, CASRN: 7440-22-4; 0.01 mg/m3) x 3
• TEEL-2 = TEEL-3/6
• TEEL-3 = MW-adjusted IDLH (1990, soluble silver compounds, CASRN: 7440-22-4; 20 mg/m3)
This review generated TEEL-3 and TEEL-2 values inconsistent with Rev. 29A. The Rev. 29A and current TEEL-1 values, source, and methodology are consistent. The Rev. 29A TEEL-3 and TEEL-2 values were derived from the TEEL-1, while the current TEEL-3 is a molecular weight adjusted IDLH from which the TEEL-2 was derived.
References
Chemical Information: https://webbook.nist.gov/cgi/inchi/InChI%3D1S/Ag.HNO2/c%3B2-1-3/h%3B(H%2C2%2C3)/q%2B1%3B/p-1 https://www.drugfuture.com/chemdata/Silver-Nitrite.html
IDLH (1990), soluble silver: https://www.cdc.gov/niosh/idlh/7440224.html
Exposure limits, soluble silver: https://www.osha.gov/chemicaldata/519