Molekula
Arsenazo I trisodium
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
Arsenazo I trisodium is a chromogenic reagent used in analytical chemistry for the detection and quantification of metal ions, particularly rare earth elements and calcium. It functions as a colorimetric indicator in complexometric titrations. Available in powder form with a molecular weight of 614.28 g/mol, CAS number 520-10-5, and molecular formula C16H10AsN2O11S2Na3. Store at ambient temperature. Hazard classification includes signal word Danger. Molekula supplies Arsenazo I trisodium 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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100 mg — £35.60 per pack ex VAT · £42.72 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 |
| Identification | Conforms to reference |
| Assay | ≥80% |
| Residue on Ignition | 22% - 26% (as sulfate) |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | III |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 90005357 |
| CAS Number | 520-10-5 |
| Molecular Formula | C16H10AsN2O11S2Na3 |
| Molecular Weight | 614.28 |
| UN Number | UN3465 |
| REACH Code | Y110 |
| HTS Code | 2931906000 |
| Tariff Code | 2931900090 |
Safety & GHS
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Toxic
GHS06
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Hazardous to the Environment
GHS09
Hazard statements
- H301 + H311 + H331 Toxic if swallowed, in contact with skin or if inhaled
- 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, 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 Arsenazo I trisodium used for?
It is primarily used as a chromogenic reagent in analytical chemistry for detecting and quantifying metal ions, especially rare earth elements and calcium.
What is the chemical formula and molecular weight of Arsenazo I trisodium?
The formula is C16H10AsN2O11S2Na3 with a molecular weight of 614.28 g/mol.
How should Arsenazo I trisodium be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade is available for Arsenazo I trisodium?
Available in analytical grade; specific purity details are provided upon request.
Can Molekula supply Arsenazo I trisodium in bulk?
Yes, bulk quantities are available—please contact our sales team for pricing and availability.
What documentation comes with an order of Arsenazo I trisodium?
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.