Molekula
Isonicotinic acid
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Isonicotinic acid is a pyridine carboxylic acid used in pharmaceutical synthesis and as a ligand in coordination chemistry. It appears as a white to pale yellow crystalline powder. CAS: 55-22-1, Molecular formula: C6H5NO2, Molecular weight: 123.11 g/mol, Storage: Ambient, Signal word: Warning. Molekula supplies Isonicotinic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
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500 g — £75.70 per pack ex VAT · £90.84 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | White to off-white crystalline powder |
| Melting Point | 315 - 320°C |
| Water | ≤ 1.0% |
| Assay | ≥ 98.0% |
| Residue on Ignition | ≤ 0.1% |
| Identification (IR) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Vapour Pressure | 0.00789 mmHg |
| pKa | pKa = 1.77 |
Source: PubChem CID 5922 (Haz-Map, ChEMBL)
Identification
| Property | Value |
|---|---|
| SKU | 63642461 |
| CAS Number | 55-22-1 |
| IUPAC Name | pyridine-4-carboxylic acid |
| EC Number | 200-228-2 |
| Molecular Formula | C6H5NO2 |
| Molecular Weight | 123.11 |
| Exact Mass | 123.032 |
| SMILES | C1=CN=CC=C1C(=O)O |
| InChIKey | TWBYWOBDOCUKOW-UHFFFAOYSA-N |
| InChI | InChI=1S/C6H5NO2/c8-6(9)5-1-3-7-4-2-5/h1-4H,(H,8,9) |
| PubChem CID | 5922 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 29333961 |
| Tariff Code | 2933399990 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H303 May be harmful if swallowed
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P304+341 IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P333+313 IF skin irritation or a rash occurs: Get medical advice/attention
- P337+313 If eye irritation persists get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 1,4-Dihydroisonicotinic acid
- 4-Carboxypyridine
- 4-Picolinic acid
- 4-Pyridinecarboxylic acid
- Acid, Isonicotinic
- Acide iso-nicotinique
- gamma-Picolinic acid
- gamma-Pyridinecarboxylic acid
- p-Pyridinecarboxylic acid
- Pyridine-4-carboxylic acid
Frequently asked questions
What is isonicotinic acid used for?
Isonicotinic acid is primarily used as an intermediate in the synthesis of pharmaceuticals, including antitubercular drugs like isoniazid.
What is the chemical formula and molecular weight of isonicotinic acid?
The chemical formula is C6H5NO2 and the molecular weight is 123.11 g/mol.
How should isonicotinic acid be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade is available for isonicotinic acid?
Molekula supplies isonicotinic acid in analytical grade.
Can Molekula supply isonicotinic acid in bulk?
Yes, Molekula can supply isonicotinic acid in bulk quantities upon request.
What documentation comes with an order of isonicotinic acid?
Each order includes a Certificate of Analysis and Safety Data Sheet (SDS) with the shipment.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.