CAS Number 57-55-6 is the registry number for Propylene Glycol (C₃H₈O₂, MW 76.09 g/mol). GRAS — practically non-toxic.
| CAS Number | 57-55-6 |
| Chemical Name | Propylene Glycol |
| Molecular Formula | C₃H₈O₂ |
| Molecular Weight | 76.09 g/mol |
| Category | Specialty Chemical |
| Available Grades | USP/99.9%/Technical |
1,2-Propanediol · MPG · Methylethyl glycol · PG