# Paracetamol: Characteristics

Why leftover PAP must be kept to tiny traces

Source page: https://www.materialinsights.org/chemicals/paracetamol/characteristics/

What this tab covers The physical and chemical properties that set its grade, price and uses, with the commercial grades and the standards that define them.

Paracetamol API is sold to pharmacopoeia standards. Particle size and flow decide whether it can be compressed directly, which saves formulators a granulation step, so DC grades earn a premium.

#### Properties that matter commercially

| Property | Value / specification | Why it matters | Source |
|---|---|---|---|
| **Assay** | 99.0-101.0% (Ph. Eur., indicative) | regulatory | Ph. Eur. (indicative) |
| **4-aminophenol impurity** | limited to tens of ppm (indicative) | PAP is toxic; residual PAP must be controlled | Ph. Eur. (indicative) |
| **Melting point** | about 169-171 C | identity | standard reference |

#### Commercial grades

- Powder
- Fine powder
- Granular
- Directly compressible (DC) with binders
- Injectable grade

## Other sections

- [Summary](https://www.materialinsights.org/chemicals/paracetamol/index.md)
- [Overview](https://www.materialinsights.org/chemicals/paracetamol/overview/index.md)
- [Correlation](https://www.materialinsights.org/chemicals/paracetamol/correlation/index.md)
- [Production route](https://www.materialinsights.org/chemicals/paracetamol/routes/index.md)
- [Production](https://www.materialinsights.org/chemicals/paracetamol/production/index.md)
- [Feedstocks](https://www.materialinsights.org/chemicals/paracetamol/feedstocks/index.md)
- [Cycles](https://www.materialinsights.org/chemicals/paracetamol/cycles/index.md)
- [Trading](https://www.materialinsights.org/chemicals/paracetamol/trading/index.md)
- [Movement](https://www.materialinsights.org/chemicals/paracetamol/movement/index.md)
- [Regulation](https://www.materialinsights.org/chemicals/paracetamol/regulation/index.md)
- [Emissions](https://www.materialinsights.org/chemicals/paracetamol/emissions/index.md)
- [Relationships](https://www.materialinsights.org/chemicals/paracetamol/links/index.md)