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VPA (Valproic acid) Selleck VS Sigma
| VPA (Valproic acid) | Selleck(S3944) | Sigma(PHR1061) |
| Free Aliquoting Service |  |
N/A |
| Price | 25mg, USD 147.0 | 1g, USD 103.70 |
| Purity | 99.04% | Unknown |
| Citations | 45 | 0 |
| Technical Support | 95.37% response rate within 2 hours | Unknown |
| Knowledge | Unknown |
Sigma is sourced from their official website（1/20/2026）