Molekula
4-Hydroxyisoquinoline
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
4-Hydroxyisoquinoline is a heterocyclic organic compound featuring a hydroxyl group attached to an isoquinoline core, primarily used as a synthetic intermediate in pharmaceuticals, agrochemicals, and organic synthesis. It serves as a key building block for APIs, dyes, and other specialty chemicals due to its reactive nitrogen-containing ring structure. CAS 3336-49-0, molecular formula C9H7NO, molecular weight 145.16 g/mol. Stored at ambient conditions. Signal word: Warning. Molekula supplies 4-Hydroxyisoquinoline 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.
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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1 g — £87.20 per pack ex VAT · £104.64 inc. VAT
Need a different quantity or pack?
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 | Solid |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 61532966 |
| CAS Number | 3336-49-0 |
| IUPAC Name | isoquinolin-4-ol |
| Molecular Formula | C9H7NO |
| Molecular Weight | 145.16 |
| Exact Mass | 145.0528 |
| SMILES | C1=CC=C2C(=C1)C=NC=C2O |
| InChIKey | DXTUTXYCHFWRQC-UHFFFAOYSA-N |
| InChI | InChI=1S/C9H7NO/c11-9-6-10-5-7-3-1-2-4-8(7)9/h1-6,11H |
| PubChem CID | 18750 |
| REACH Code | Y110 |
| HTS Code | 2933.52.9000 |
| Tariff Code | 2933499090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H302 Harmful 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+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
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
- 4-ISOQUINOLINOL
- 4-Isoquinolol
- 4-oxidoisoquinolinium
- DXTUTXYCHFWRQC-UHFFFAOYSA-N
- isoquinolin-4-ol
- isoquinoline, 4-hydroxy-
- US12338238, Example 59
Frequently asked questions
What is 4-Hydroxyisoquinoline commonly used for?
4-Hydroxyisoquinoline is primarily used as a building block in organic synthesis, including the preparation of pharmaceuticals, agrochemicals, and fluorescent dyes.
What is the molecular formula and molecular weight of 4-Hydroxyisoquinoline?
The molecular formula is **C9H7NO** and the molecular weight is **145.16 g/mol**.
How should 4-Hydroxyisoquinoline be stored?
Store at **ambient temperature** in a cool, dry place, away from incompatible substances.
What purity grades are available for this product?
Molekula supplies 4-Hydroxyisoquinoline in **technical and reagent-grade purities**—please inquire for specific specifications.
Can Molekula supply 4-Hydroxyisoquinoline in bulk quantities?
Yes, we offer bulk quantities of 4-Hydroxyisoquinoline—contact us for pricing and availability.
What documentation is provided with an order of 4-Hydroxyisoquinoline?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a product specification sheet.
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.