Molekula
Nessler's Reagent
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
Nessler’s Reagent is a chemical solution used primarily for detecting ammonia and ammonium ions in water and other samples through its formation of a yellow to brownish precipitate. Composed of mercury(II) iodide and potassium iodide in potassium hydroxide, it reacts with ammonia to produce a measurable color change. This reagent is classified as **Danger** due to its mercury content and requires careful handling. Molekula supplies Nessler’s Reagent 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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500 mL — £217.30 per pack ex VAT · £260.76 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 | Clear colourless to light yellow liquid |
| Boiling Point | 104 - 106°C |
| Solubility in water | miscible in water |
| Sensitivity to Ammonium | Passes Test |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 (6.1) |
| Packing Group | I |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 90033454 |
| Molecular Weight | N/A |
| UN Number | UN2922 |
| REACH Code | Y110 |
| HTS Code | 3822.19.0080 |
| Tariff Code | 3822190090 |
Safety & GHS
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Corrosive
GHS05
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Toxic
GHS06
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Serious Health Hazard
GHS08
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Hazardous to the Environment
GHS09
Hazard statements
- H290 May be corrosive to metals
- H301 Toxic if swallowed
- H310 Fatal in contact with skin
- H314 (sub cat. 1A) Causes severe skin burns and eye damage
- H330 Fatal if inhaled
- H373 May cause damage to organs through prolonged or repeated exposure
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P304+312 IF INHALED: Call a POISON CENTER or doctor/physician if you feel unwell
Documents
Safety Data Sheets (SDS)
Available in English, English (US), 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
No alternate names recorded for this product.
Frequently asked questions
What is Nessler’s Reagent primarily used for?
Nessler’s Reagent is primarily used for the **colorimetric determination of ammonia and ammonium ions** in water and other samples, forming a yellow to brownish precipitate.
What is the chemical formula of Nessler’s Reagent?
The reagent is typically a **potassium tetraiodomercurate(II) solution** (K₂[HgI₄]) in potassium hydroxide (KOH), often prepared fresh due to instability.
How should Nessler’s Reagent be stored?
Store at **ambient temperature** in a tightly sealed container, away from light and moisture, and prepare fresh when possible for accurate results.
What grade of Nessler’s Reagent does Molekula supply?
Molekula supplies **analytical-grade Nessler’s Reagent** suitable for laboratory testing, ensuring compliance with standard analytical methods.
Can Molekula supply Nessler’s Reagent in bulk quantities?
Yes, bulk quantities are available upon request—contact our sales team for custom packaging and pricing for larger orders.
What documentation comes with an order of Nessler’s Reagent?
Each order includes a **Certificate of Analysis (CoA)**, Safety Data Sheet (SDS), and batch-specific documentation for traceability and compliance.
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.