4-Nitrobenzoic acid
CAS 62-23-7
EC 200-526-2
Formula C7H5NO4
MW 167.12 g/mol
Organic Acids Personal Care & CosmeticsFood & NutritionPharmaceuticals & Healthcare Preservation & BiocidepH Regulation & Buffering
Description
4-Nitrobenzoic acid (CAS 62-23-7) is an aromatic organic acid commonly referred to as PNBA or p-Nitrobenzoic acid, with additional trade designations including NSC 7707 and Nitrodracylic acid. It carries no assigned E-code and is classified under organic acids with the molecular formula C7H5NO4.
In pharmaceutical formulations, PNBA functions as an antimicrobial preservative by disrupting microbial cell membrane integrity at low concentrations. Personal care manufacturers incorporate it as a pH buffer and skin conditioner, where its acidic dissociation equilibrium stabilises product formulations within target pH ranges. It also serves as an intermediate in synthesising dyes and colorants for industrial applications.
This material is supplied as a light yellow crystalline powder meeting pharmaceutical and technical grade specifications, with compliance relevant to REACH registration requirements within the EU. Procurement teams should reference HS code 29163900 for import classification. Standard packaging formats are available upon request from our European distribution network.
In pharmaceutical formulations, PNBA functions as an antimicrobial preservative by disrupting microbial cell membrane integrity at low concentrations. Personal care manufacturers incorporate it as a pH buffer and skin conditioner, where its acidic dissociation equilibrium stabilises product formulations within target pH ranges. It also serves as an intermediate in synthesising dyes and colorants for industrial applications.
This material is supplied as a light yellow crystalline powder meeting pharmaceutical and technical grade specifications, with compliance relevant to REACH registration requirements within the EU. Procurement teams should reference HS code 29163900 for import classification. Standard packaging formats are available upon request from our European distribution network.
Physical Properties
| Melting Point | 242 °C |
| Boiling Point | 150 °C @ Press: 0.02 Torr |
| Density | 1.610 g/cm³ @ Temp: 20 °C |
| Flash Point | 237 °C |
| Appearance | light yellow crystalline powder |
| Color | Light yellow |
| Form | Crystalline Powder |
| Water Solubility | <0.1 g/100 mL at 26 ºC |
| Refractive Index | 1.6280 (estimate) |
| pH | 3.1 (0.42g/l, H2O, 20℃)(saturated solution) |
| Log P | 1.890 |
Safety & Handling (Learn More)
Danger GHS07 GHS08
H
H302H319H320H332H335H360H371
P
P203P260P261P264P270P271P280P317P318P319P330P405P501P264+P265P301+P317P304+P340P308+P316P337+P317P403+P233P305+P351+P338
Trade & Regulatory
| HS Code | 29163900 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 1 |
Other Names
p-Nitrodracylic AcidPNBANitrodracylic acid4-nitro-benzoicacip-Nitrobenzoic acidRARECHEM AL BO 0233
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Derivatives
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