MilliporeSigma
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100994

Sigma-Aldrich

Para Red

Dye content 95 %

Synonym(s):
1-(p-Nitrophenylazo)-2-naphthol, 1-(4-Nitrophenylazo)-2-naphthol
Linear Formula:
O2NC6H4N=NC10H6OH
CAS Number:
Molecular Weight:
293.28
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.47

Quality Level

form

solid

composition

Dye content, 95%

mp

248-252 °C (lit.)

λmax

488 nm

SMILES string

Oc1ccc2ccccc2c1N=Nc3ccc(cc3)[N+]([O-])=O

InChI

1S/C16H11N3O3/c20-15-10-5-11-3-1-2-4-14(11)16(15)18-17-12-6-8-13(9-7-12)19(21)22/h1-10,20H

InChI key

WOTPFVNWMLFMFW-UHFFFAOYSA-N

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General description

Para Red is a biological stain. It is used as a fat soluble chemical dye and food additive. It is a banned colorant and a number of analytical techniques have been developed to detect it in food.

Packaging

25 g in glass bottle

Biochem/physiol Actions

Para Red may be used to make standards for analysis.

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

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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