PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Paraformaldehyde | 30525-89-4 | 2213 |
14.01
14.02
11.01
11.00
4.08
7.01
4.09
4.10
4.07
3.02
|
|||||||||
| Formula | Synonyms | |||||||||||
| (CH2O)n | PARAFORMALDEHYDE, ALDACIDE, FLO-MOR, FORMALDEHYDE POLYMER, PARAFORM, PARAFORMALDEHÍDO (DOT SPANISH), PARAFORMALDÉHYDE (DOT FRENCH), POLYFORMALDEHYDE, POLYOXYMETHYLENE, POLYOXYMETHYLENE GLYCOL | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 30.03 | S | 155 | 1.46 @ 15°C | 70000 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.45 | 5 | 30 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.37 | 4.1 | 24 |
Technical Basis
A review of limited sources identified the following: rat LD50 and LC50 acute toxicity data. Data sources were selected according to the hierarchy listed in Table 3.1. Toxicity data were selected according to type of exposure, species, and route according to the hierarchies stated in Sections 3.3.1, 3.3.2, and evaluated using factors in Tables 3.2, 3.3, and 3.4. The rat LC50 was selected as the TEEL-3 basis. TEEL-2 and TEEL-1 values were derived accorded to Table 3.5
• TEEL-1 = TEEL-2/11
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat LC50 (1070 mg/m3/1H)
This review generated TEEL values that are inconsistent with those found in Rev 29A. The Rev. 29A TEEL-3 basis was a 4-hour rat LC50 that was not found during the current review. Instead, the current TEEL-3 basis is a 1-hour rat LC¬¬50, which resulted in a comparable order of magnitude as Rev. 29A. The Rev. 29A TEEL-2 basis was a rat oral TDLo not found during current research. The current TEEL-2 was therefore derived from the TEEL-3 (Table 3.5). The Rev. 29A and current TEEL-1 use the same methodology but are different due to the change in TEEL-2 values.
• TEEL-1 = TEEL-2/11
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat LC50 (1070 mg/m3/1H)
This review generated TEEL values that are inconsistent with those found in Rev 29A. The Rev. 29A TEEL-3 basis was a 4-hour rat LC50 that was not found during the current review. Instead, the current TEEL-3 basis is a 1-hour rat LC¬¬50, which resulted in a comparable order of magnitude as Rev. 29A. The Rev. 29A TEEL-2 basis was a rat oral TDLo not found during current research. The current TEEL-2 was therefore derived from the TEEL-3 (Table 3.5). The Rev. 29A and current TEEL-1 use the same methodology but are different due to the change in TEEL-2 values.
References
https://pubchem.ncbi.nlm.nih.gov/compound/Paraformaldehyde.
https://haz-map.com/Agents/100