PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dimethylbutyric acid, 2,2- | 595-37-9 |
15.01
15.02
11.01
|
||||||||||
| Formula | Synonyms | |||||||||||
| C2.H5.C(C.H3)2.C.O2.H | ||||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 116.16 | L | 0.928 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 12 | 130 | 790 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 2.5 | 27 | 170 |
Technical Basis
A review of available sources did not identify exposure limits or acute toxicity data for 2,2-dimethylbutryic acid. The reported GHS health hazard ratings (H315 and H319, Category 2; H335, Category 3) and NFPA=2 indicate a mid-level health hazard, approximately equivalent to an HHR=2. Considering this, analysts assumed an HHR=2 as the TEEL-3 basis (Section 3.4.5). TEEL-2 and TEEL-1 values were derived according to Table 3.5.
• PAC-1 = TEEL-1 = TEEL-2/11
• PAC-2 = TEEL-2 = TEEL-3/6
• PAC-3 = TEEL-3 = HHR=2
This review generated PAC values consistent with Rev. 29A*.
• PAC-1 = TEEL-1 = TEEL-2/11
• PAC-2 = TEEL-2 = TEEL-3/6
• PAC-3 = TEEL-3 = HHR=2
This review generated PAC values consistent with Rev. 29A*.
References
Chemical information and GHS ratings: https://pubchem.ncbi.nlm.nih.gov/compound/2_2-Dimethylbutyric-acid. and https://www.chemicalbook.com/ChemicalProductProperty_EN_CB0675444.htm
Thermo Fisher Scientific SDS and Chemical Book SDS; NFPA=2: https://www.fishersci.com/store/msds?partNumber=AC434860250&productDescription=2%2C2-DIMETHYLBUTYRIC+ACID+25GR&vendorId=VN00032119&countryCode=US&language=en and https://www.chemicalbook.com/msds/2-2-dimethylbutyric-acid.htm