Chromotropic acid disodium salt dihydrate

SKU: C0231

Category: Non Fluorescent Detection & Chromogene Detection

Synonyms: 1,8-Dihydroxynaphthalene-3,6-disulfonic acid disodium salt , 4,5-Dihydroxynaphthalene-2,7-disulfonic acid disodium salt , Mordant Brown 7 Dihydrate , Chromogen C Dihydrate; 5808-22-0
CAS-Number: (HO)₂C₁₀H₄(SO₃Na)₂·₂H₂O
Molecular Formula: 400.29
Molecular Weight

Product Data
Handling
Safety Information
Details

Specifications

Purity: ≥99% (T)
Identity: 1H-NMR
Appearance: Off-white solid

Properties

Melting Point: 300°C
Solvents: water

Handling Advice: Protect from light and moisture.
Use / Stability: Stable for at least 2 years after receipt when stored at RT.
Long Term Storage: RT
Short Term Storage: RT
Shipping: AMBIENT

Transportation: Not dangerous goods
Signal word: Warning
GHS Symbol: GHS07
Precautionary statements: P261-P305 + P351 + P338
Hazard statements: H315-H319-H335

Description: Fluorogenic reagent for analytical the detection of Ag, ClO₃^-, Cr, Hg, NO₂^-, NO₃^2-, Ti or CH₂O (formaldehyde). Quantitative determination of formaldehyde is based on the specific formation of a red coloration (peaking at 580 nm wavelength) when chromotropic acid in 75% sulfuric acid reacts with formaldehyde. May be employed as a chromogenic reagent for the quantification of dipyrone in various pharmaceutical preparations.
InChi: 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
References: (1) D. Letourneau & N. Krog , Plant Physiol. 27, 822 (1952) , (2) H.B. He, et al. , Talanta 38, 1159 (1991) , (3) B.-L. Poh, et al. , Tetrahedr. Lett. 30, 1005 (1989) , (4) B.K. Pal & K. Baksi , Mikrochim. Acta 108, 275 (1992) , (5) Z. Zhao, et al. , Microchem. J. 58, 1 (1998) , (6) L. Pezza, et al. , Anal. Sci. 16, 313 (2000) , (7) F. Gasparini, et al. , J. Braz. Chem. Soc. 19, 1531 (2008)
InChi Key: QUEAKWJKJBFNEG-UHFFFAOYSA-L
Smiles: OC1=C(C(O)=CC(S(=O)([O-])=O)=C2)C2=CC(S(=O)([O-])=O)=C1.O.O.[Na+].[Na+]

Fluorogenic reagent for analytical the detection of Ag, ClO₃^–, Cr, Hg, NO₂^–, NO₃^2-, Ti or CH₂O (formaldehyde). Quantitative determination of formaldehyde is based on the specific formation of a red coloration (peaking at 580 nm wavelength) when chromotropic acid in 75% sulfuric acid reacts with formaldehyde. May be employed as a chromogenic reagent for the quantification of dipyrone in various pharmaceutical preparations.

SKU: C0231 Category: Non Fluorescent Detection & Chromogene Detection

Additional information

Additional information

Synonyms	1,8-Dihydroxynaphthalene-3,6-disulfonic acid disodium salt, 4,5-Dihydroxynaphthalene-2,7-disulfonic acid disodium salt, Mordant Brown 7 Dihydrate, Chromogen C Dihydrate
Purity	≥99% (T)
Appearance	Off-white solid
CAS-Number	5808-22-0
Molecular Formula	(HO)2C10H4(SO3Na)2·2H2O
Molecular Weight	400.29
Identity	1H-NMR
Solvents	water
Melting Point	300°C
Smiles	OC1=C(C(O)=CC(S(=O)([O-])=O)=C2)C2=CC(S(=O)([O-])=O)=C1.O.O.[Na+].[Na+]
InChi Key	QUEAKWJKJBFNEG-UHFFFAOYSA-L
Shipping	AMBIENT
Short Term Storage	RT
Long Term Storage	RT
Handling Advice	Protect from light and moisture.
Use / Stability	Stable for at least 2 years after receipt when stored at RT.
Hazard statements	H315-H319-H335
Precautionary statements	P261-P305 + P351 + P338
GHS Symbol	GHS07
Signal word	Warning
Transportation	Not dangerous goods
References	(1) D. Letourneau & N. Krog, Plant Physiol. 27, 822 (1952), (2) H.B. He, et al., Talanta 38, 1159 (1991), (3) B.-L. Poh, et al., Tetrahedr. Lett. 30, 1005 (1989), (4) B.K. Pal & K. Baksi, Mikrochim. Acta 108, 275 (1992), (5) Z. Zhao, et al., Microchem. J. 58, 1 (1998), (6) L. Pezza, et al., Anal. Sci. 16, 313 (2000), (7) F. Gasparini, et al., J. Braz. Chem. Soc. 19, 1531 (2008)
InChi	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), 21H2/q, 2+1, /p-2
Quantity	50 g, 250 g, Bulk