27150

Chromotropic acid disodium salt dihydrate

puriss. p.a., ACS reagent, for the detection of Ag, ClO₃^-, Cr, Hg, NO₂^-, NO₃^2-, Ti, ≥98.0%

• Synonym(s): 1,8-Dihydroxynaphthalene-3,6-disulfonic acid disodium salt, 4,5-Dihydroxynaphthalene-2,7-disulfonic acid disodium salt
• Linear Formula: (HO)₂C₁₀H₄(SO₃Na)₂·2H₂O
• CAS Number: 5808-22-0
• Molecular Weight: 400.29
• EC Number: 204-972-9
• MDL number: MFCD00150612
• UNSPSC Code: 12352100
• PubChem Substance ID: 57648221
• NACRES: NA.21

Properties

• grade: ACS reagent; puriss. p.a.
• Quality Level: 200
• Assay: ≥98.0%
• form: powder
• quality: for the detection of Ag, ClO₃^-, Cr, Hg, NO₂^-, NO₃^2-, Ti
• technique(s): UV/Vis spectroscopy: suitable
• impurities: 8-10% water
• color: off-white
• mp: >300 °C (lit.)
• SMILES string: O.O.[Na+].[Na+].Oc1cc(cc2cc(cc(O)c12)S([O-])(=O)=O)S([O-])(=O)=O
• InChI: 1S/C10H8O8S2.2Na.2H2O/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);;;2*1H2/q;2*+1;;/p-2
• InChI key: QUEAKWJKJBFNEG-UHFFFAOYSA-L

Description

General description

Chromotropic acid disodium salt dihydrate is a useful analytical reagent widely used in analytical chemistry for fluorometric determinations.

Application

Chromotropic acid disodium salt dihydrate may be employed as a chromogenic reagent in the following studies:      

• Quantification of dipyrone in various pharmaceutical preparations.   
• Highly sensitive method for rapid determination of beryllium by a fluorimetric method.

Safety Information

• Pictograms: GHS07
• Signal Word: Warning
• Hazard Statements: H315,H319,H335
• Precautionary Statements: 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 Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves