PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Germanous acid | z-0023 |
4.08
11.00
4.06
4.07
|
||||||||||
| Formula | Synonyms | |||||||||||
| Ge.H2.O3 | ||||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 122.604 | S |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 30 | 330 | 2000 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 6.0 | 66 | 400 |
Technical Basis
The CASRN listed does not correspond to a compound in the CAS database. As such, the available chemical formula and molecular weight from the PAC-TEEL database was used. A review of available sources did not identify exposure limits, acute toxicity data, or GHS health hazard ratings for germanous acid. However, germanium compounds are reported to be of “a low order of toxicity,” according to Sax’s Dangerous Properties. Considering this, the PNOS TLV-TWA was selected as the TEEL-1 basis (PNOS, Section 3.5.2). TEEL-3 and TEEL-2 values were derived according to Table 3.5.
• PAC-1 = TEEL-1 = TLV-TWA (PNOS, 10 mg/m3) x 3
• PAC-2 = TEEL-2 = TEEL-1 x 11
• PAC-3 = TEEL-3 = TEEL-2 x 6
This review generated PAC values consistent with Rev. 29A*.
• PAC-1 = TEEL-1 = TLV-TWA (PNOS, 10 mg/m3) x 3
• PAC-2 = TEEL-2 = TEEL-1 x 11
• PAC-3 = TEEL-3 = TEEL-2 x 6
This review generated PAC values consistent with Rev. 29A*.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/15787686
Germanium compounds. Lewis, R.J. Sax's Dangerous Properties of Industrial Materials. 10th ed. Volumes 1-5 New York, NY: John Wiley & Sons Inc., 2012., p. 2271.