SPADNS
Also known as: Trisodium 1,8-dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6-disulfonate, 2-(4-Sulfophenylazo)chromotropic acid trisodium salt, 4,5-Dihydroxy-3-(4-sulfophenylazo)-2,7-naphthalenedisulfonic acid trisodium salt, Sulfanilic acid azochromotrop, 1,8-Dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6-disulfonic acid trisodium salt, SPADNS, Reagent, ACS
SPADNS (CAS 23647-14-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C16H10N2Na3O11S3 and a molecular weight of 570.41400 g/mol. Key property: a melting point of >300ºC. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. It is listed by 3 suppliers, 2 of which publish reference prices, from 3.20 to 42.00 CNY. Record last updated Nov 3, 2026.
- CAS No.
- 23647-14-5
- Jingsj CID
- J-41097-1
- Molecular Formula
- C16H10N2Na3O11S3
- Molecular Weight
- 570.41400 g/mol
- Category
- Organic Acids
- Last updated
- 11/3/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
In Stock | >95.0%(HPLC) 500g | ¥1,600.00 | $0.48 /gBest ¥3.20/g CNY | CN China MOQ 500g | |
Made to OrderPlatform-operated | 99% 500g | ¥2,500.00 | $0.75 /g ¥5.00/g CNY | CN China MOQ 500g | |
In Stock | >95.0%(HPLC) 100g | ¥530.00 | $0.79 /g ¥5.30/g CNY | CN China MOQ 100g |
Physicochemical Properties
| Melting Point | >300ºC |
|---|---|
| Exact Mass | 569.90600 |
| PSA | 261.92000 |
| LogP | 4.62110 |
| Additional Property | 220g/l |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Frequently Asked Questions
What is the CAS number of SPADNS?
The CAS number of SPADNS is 23647-14-5.
What are the molecular formula and molecular weight of SPADNS?
SPADNS has molecular formula C16H10N2Na3O11S3 and molecular weight 570.41400 g/mol.
Which suppliers offer SPADNS?
3 supplier(s) listed; reference unit price ¥3.20–42.00 /g.
Is SPADNS hazardous?
SPADNS has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "SPADNS (CAS 23647-14-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-41097-1 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.