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130796

Sigma-Aldrich

3-Hydroxy-4-(2-hydroxy-4-sulfo-1-naphthylazo)-2-naphthalenecarboxylic acid

indicator grade, Dye content 60 %

Synonym(s):

2-Hydroxy-1-(2-hydroxy-4-sulfo-1-naphthylazo)-3-naphthoic acid, Cal-Red™, Calconcarboxylic acid, HHSNN, Patton and Reeder’s reagent

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About This Item

Linear Formula:
HOC10H5[N=NC10H5(OH)SO3H]CO2H
CAS Number:
3737-95-9
Molecular Weight:
438.41
Beilstein:
727492
EC Number:
223-117-0
MDL number:
MFCD00004078
UNSPSC Code:
12171500
Pricing and availability is not currently available.

grade

indicator grade

composition

Dye content, 60%

mp

300 °C (lit.)

λmax

366 nm
560 nm (2nd)

SMILES string

OC(=O)c1cc2ccccc2c(N=Nc3c(O)cc(c4ccccc34)S(O)(=O)=O)c1O

Legal Information

Cal-Red is a trademark of Sigma-Aldrich Co. LLC

replaced by

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Description
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Certificates of Analysis (COA)

Lot/Batch Number
07226KT
23218EF
14113ER
11123EN
08910CB

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