1.02498

Chromotropic acid disodium salt dihydrate

for analysis ACS,Reag. Ph Eur

• Synonym(s): Chromotropic acid disodium salt dihydrate, 4,5-Dihydroxy-2,7-naphthalene disulfonic acid sodium salt
• Empirical Formula (Hill Notation): C₁₀H₆Na₂O₈S₂ · 2H₂O
• CAS Number: 5808-22-0
• Molecular Weight: 400.29
• UNSPSC Code: 12352107
• EC Index Number: 204-972-9
• NACRES: NA.21
• MDL number: MFCD00150612

Properties

• grade: ACS reagent
• Quality Segment: 200
• agency: reag. Ph. Eur.
• assay: ≥98.5% (acidimetric)
• form: solid
• composition: Water, 8.5-9.5% Karl Fischer
• color: gray-white to brownish white
• pH: 3.6 (20 °C, 10 g/L in H₂O)
• mp: >300 °C
• bulk density: 780 kg/m³
• storage temp.: 2-30°C
• SMILES string: [S](=O)(=O)(O)c1cc2c(c(c1)[O-])c(cc(c2)[S](=O)(=O)O)[O-]
• InChI: 1S/C10H8O8S2/c11-8-3-6(19(13,14)15)1-5-2-7(20(16,17)18)4-9(12)10(5)8/h1-4,11-12H,(H,13,14,15)(H,16,17,18)/p-2
• InChI key: HLVXFWDLRHCZEI-UHFFFAOYSA-L

Description

Analysis Note

Appearance: greyish white to brownish white powder
Assay (acidimetric, calc. on anhydrous substance): ≥ 98.5 %
Identity (IR-spectrum): passes test
Appearance of solution (5 %; water): passes test
Water (according to Karl Fischer): 8.5 - 9.5 %
Sensitivity (of formaldehyde): passes test
Sensitivity (of nitrate): passes test

Other Notes

Replaces: DX1460-1

Safety Information

• pictograms: GHS07
• signalword: Warning
• hcodes: H315 - H319 - H335
• pcodes: P261 - P264 - P271 - P280 - P302 + P352 - P305 + P351 + P338
• Hazard Classifications: Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
• target_organs: Respiratory system
• Storage Class: 11 - Combustible Solids
• wgk: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable