Molekula
Isoniazid
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
Isoniazid is a first-line antitubercular medication used to treat and prevent tuberculosis. It functions by inhibiting mycolic acid synthesis in Mycobacterium tuberculosis. Available in powder form with a CAS number of 54-85-3, molecular formula C6H7N3O, and molecular weight of 137.14 g/mol. Stable at ambient storage conditions. Signal word: Danger. Molekula supplies Isoniazid 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.
Often bought together
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.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — $58.70 per pack
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Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White crystalline powder |
| pH | 6.0 - 8.0 |
| Loss on Drying | 0.5% max |
| Assay | 98.0% min |
| Residue on Ignition | 0.1% max |
| MP | 170 - 174°C |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | III |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless or white crystals, or a white, crystalline powder |
| Melting Point | 171.4 °C |
| Water Solubility | 140 g/L at 25 °C |
| Vapour Pressure | 4.6 × 10⁻⁵ mmHg at 25 °C (Estimated) |
| pKa | pKa = 1.82 (at 20 °C) |
| log P (octanol/water) | -0.70 |
Source: PubChem CID 3767 (HSDB, DrugBank)
Identification
| Property | Value |
|---|---|
| SKU | 26989064 |
| CAS Number | 54-85-3 |
| IUPAC Name | pyridine-4-carbohydrazide |
| EC Number | 200-214-6 |
| Molecular Formula | (H2NNHCO)C5H4N |
| Molecular Weight | 137.14 |
| Exact Mass | 137.0589 |
| SMILES | C1=CN=CC=C1C(=O)NN |
| InChIKey | QRXWMOHMRWLFEY-UHFFFAOYSA-N |
| InChI | InChI=1S/C6H7N3O/c7-9-6(10)5-1-3-8-4-2-5/h1-4H,7H2,(H,9,10) |
| PubChem CID | 3767 |
| UN Number | UN2811 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2941.90.3000 |
| Tariff Code | 2941900000 |
Safety & GHS
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Toxic
GHS06
Hazard statements
- H301 Toxic if swallowed
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P302+352 IF ON SKIN: Wash with soap and water
- P304+340 IF INHALED: 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
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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
- Cotinazin
- Dinacrin
- Hydrazid
- Iscotin
- Isoniazide
- Isonicotinic acid hydrazide
- Isonicotinohydrazide
- Nydrazid
- pyridine-4-carbohydrazide
- Rimifon
Frequently asked questions
What is Isoniazid used for?
Isoniazid is primarily used in the treatment and prevention of tuberculosis (TB). It is a first-line antitubercular agent that inhibits mycolic acid synthesis in Mycobacterium tuberculosis.
What is the chemical formula and molecular weight of Isoniazid?
The chemical formula of Isoniazid is C6H7N3O, and its molecular weight is 137.14 g/mol.
How should Isoniazid be stored?
Isoniazid should be stored at ambient temperature, protected from light and moisture, and kept in a tightly closed container.
What grade of Isoniazid does Molekula supply?
Molekula supplies Isoniazid in research grade, suitable for laboratory use and pharmaceutical development.
Can Molekula supply Isoniazid in bulk?
Yes, Molekula can supply Isoniazid in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with an Isoniazid order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS); additional documentation can be provided upon request.
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.