PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sodium formate | 141-53-7 |
15.01
4.01
11.01
8.00
7.00
4.05
4.09
7.01
|
||||||||||
| Formula | Synonyms | |||||||||||
| CHNaO2 | ||||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 68.01 | S | 257 | 1.92 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 3.0 | 25 | 250 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 8.3 | 70 | 700 |
Technical Basis
A review of available data sources identified the following: LC501 and LD50 (rat2, mouse3) for oral, routes. As noted in the description, sodium formate is hygroscopic4.When this occurs, formate transforms to its conjugate acid, formic acid (CASRN: 64-18-6,); therefore, available ERPG values for formic acid were also evaluated5. Toxicity data were evaluated for their relative preference ranking (Section 3.3.2, Table 3.1). Although the LC50 value is the most preferred, no time was specified in the source and an assumed time of 240 minutes was used to estimate a time-scaled TEEL value7. Of the remaining toxicity data, TEEL estimates were comparable to ERPG formic acid values. Given that ERPG values are more preferred than toxicity derived TEELs (Section 3.2), the formic acid ERPG values are recommended for sodium formate TEEL values.
• TEEL-1 = ERPG-1 (Formic acid, CASRN: 64-18-6)
• TEEL-2 = ERPG-2 (Formic acid, CASRN: 64-18-6)
• TEEL-3 = ERPG-3 (Formic acid, CASRN: 64-18-6)
This review generated TEEL values inconsistent with those published in Rev. 29A, due to a different starting point.
• TEEL-1 = ERPG-1 (Formic acid, CASRN: 64-18-6)
• TEEL-2 = ERPG-2 (Formic acid, CASRN: 64-18-6)
• TEEL-3 = ERPG-3 (Formic acid, CASRN: 64-18-6)
This review generated TEEL values inconsistent with those published in Rev. 29A, due to a different starting point.
References
Rat, LC50 unspecified time, 1990: USA EPA High Production Volume Information System (HPVIS); via CompTox: https://comptox.epa.gov/dashboard/chemical/hazard/DTXSID2027090
Rat oral LD50, per day, 2005: USA EPA High Production Volume Information System (HPVIS); via CompTox: https://comptox.epa.gov/dashboard/chemical/hazard/DTXSID2027090
Mouse oral LD50, per day, 2005: USA EPA High Production Volume Information System (HPVIS); via CompTox: https://comptox.epa.gov/dashboard/chemical/hazard/DTXSID202709.
https://pubchem.ncbi.nlm.nih.gov/compound/Sodium-formate#section=Experimental-Properties.
https://cameochemicals.noaa.gov/chemical/3513
A time-scaling exposure of 240 minutes was assumed (Section 3.3.2) and ten Berge time-scaled to 60 minutes (Section 3.3.4).