Molekula
Fast Red KL salt
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
Fast Red KL salt is a stabilized diazonium salt (2-carbamoyl-5-methoxybenzenediazonium chloride, zinc chloride double salt) used in analytical chemistry for dyeing and staining applications, particularly in histology and microscopy, where it couples with naphthol substrates in enzyme histochemistry to form a coloured azo dye. It is a salt of a diazo compound with zinc chloride. CAS: 86780-25-8, Molecular formula: C8H8N3O2 · 1/2ZnCl2, Molecular weight: 246.32 g/mol. Store at ambient temperature. Signal word: Warning. Molekula supplies Fast Red KL salt 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 — £38.70 per pack ex VAT · £46.44 inc. VAT
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5 g — £140.30 per pack ex VAT · £168.36 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 | Brown to red powder |
| pH | 7-8 |
| Moisture | NMT 5% |
| Dye Content | >25% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 18510379 |
| CAS Number | 86780-25-8 |
| IUPAC Name | 2-carbamoyl-5-methoxybenzenediazonium chloride |
| Molecular Formula | C8H8N3O2 · 1/2ZnCl2 |
| Molecular Weight | 246.32 |
| Exact Mass | 213.0305 |
| SMILES | COC1=CC(=C(C=C1)C(=O)N)[N+]#N.[Cl-] |
| InChIKey | LPTBOYZVJIBCPQ-UHFFFAOYSA-N |
| InChI | InChI=1S/C8H7N3O2.ClH/c1-13-5-2-3-6(8(9)12)7(4-5)11-10;/h2-4H,1H3,(H-,9,12);1H |
| PubChem CID | 18991222 |
| REACH Code | Y110 |
| HTS Code | 2927.00.3000 |
| Tariff Code | 2927000090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- 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
- 2-carbamoyl-5-methoxybenzene-1-diazonium chloride
- 2-carbamoyl-5-methoxybenzenediazonium;chloride
- FAST RED KL SALT PURE
Frequently asked questions
What is Fast Red KL salt used for?
Fast Red KL salt is primarily used as a dye intermediate in the production of azo dyes for textiles and leather.
What is the chemical formula and molecular weight of Fast Red KL salt?
The formula is C8H8N3O2 · 1/2ZnCl2 with a molecular weight of 246.32 g/mol.
How should Fast Red KL salt be stored?
It should be stored at ambient temperature, protected from moisture and direct sunlight.
What grade of Fast Red KL salt is available?
Molekula supplies Fast Red KL salt in technical grade for industrial applications.
Can Molekula supply Fast Red KL salt in bulk?
Yes, Molekula can supply Fast Red KL salt in bulk quantities; please contact our sales team for pricing and availability.
What documentation comes with a purchase of Fast Red KL salt?
Each order includes a Certificate of Analysis (CoA) 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.