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59828

Sigma-Aldrich

Chromotropic acid disodium salt dihydrate

reagent grade, ≥95.0%

Synonym(s):

1,8-Dihydroxynaphthalene-3,6-disulfonic acid disodium salt, 4,5-Dihydroxynaphthalene-2,7-disulfonic acid disodium salt

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About This Item

Linear Formula:
(HO)2C10H4(SO3Na)2·2H2O
CAS Number:
Molecular Weight:
400.29
MDL number:
UNSPSC Code:
12352106
NACRES:
NA.22

grade

reagent grade

Quality Level

Assay

≥95.0%

impurities

8-10% water

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

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Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

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


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