Molekula
Arsenazo III disodium 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
Arsenazo III disodium salt 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 spectrophotometric assays. Available with a CAS number of 62337-00-2, its molecular formula is C22H16As2N4Na2O14S2 and molecular weight is 820.33 g/mol. It should be stored at ambient temperature. Signal word: Danger. Molekula supplies Arsenazo III disodium 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.
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1 g — £224.00 per pack ex VAT · £268.80 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | Black powder |
| FT-IR | Complies to sample structure |
| Identification (MASS) | Should conform to the structure |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | II |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 26370032 |
| CAS Number | 62337-00-2 |
| IUPAC Name | disodium;3,6-bis[(2-arsonophenyl)diazenyl]-4,5-dihydroxynaphthalene-2,7-disulfonate |
| EC Number | 263-516-7 |
| Molecular Formula | C22H16As2N4Na2O14S2 |
| Molecular Weight | 820.33 |
| Exact Mass | 819.8332 |
| SMILES | C1=CC=C(C(=C1)N=NC2=C(C3=C(C(=C(C=C3C=C2S(=O)(=O)[O-])S(=O)(=O)[O-])N=NC4=CC=CC=C4[As](=O)(O)O)O)O)[As](=O)(O)O.[Na+].[Na+] |
| InChIKey | KSSZSGSRTIMTBY-UHFFFAOYSA-L |
| InChI | InChI=1S/C22H18As2N4O14S2.2Na/c29-21-18-11(9-16(43(37,38)39)19(21)27-25-14-7-3-1-5-12(14)23(31,32)33)10-17(44(40,41)42)20(22(18)30)28-26-15-8-4-2-6-13(15)24(34,35)36;;/h1-10,29-30H,(H2,31,32,33)(H2,34,35,36)(H,37,38,39)(H,40,41,42);;/q;2*+1/p-2 |
| PubChem CID | 135472947 |
| UN Number | UN3465 |
| REACH Code | Y110 |
| Tariff Code | 2931900090 |
Safety & GHS
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Toxic
GHS06
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Serious Health Hazard
GHS08
-
Hazardous to the Environment
GHS09
Hazard statements
- H301 + H311 + H331 Toxic if swallowed, in contact with skin or if inhaled
- H350 May cause cancer
- 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
- 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, 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
- arcenazo iii
- Disodium 3,6-bis((o-arsonophenyl)azo)-4,5-dihydroxynaphthalene-2,7-disulphonate
Frequently asked questions
What is Arsenazo III disodium salt 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 III disodium salt?
The formula is C22H16As2N4Na2O14S2 with a molecular weight of 820.33 g/mol.
How should Arsenazo III disodium salt be stored?
It should be stored at ambient temperature, protected from light and moisture.
What grade is available for Arsenazo III disodium salt?
It is available in analytical grade for laboratory use.
Can Molekula supply Arsenazo III disodium salt in bulk?
Yes, Molekula can supply Arsenazo III disodium salt in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with an order of Arsenazo III disodium 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.