Skip to Content
Merck
All Photos(2)

Key Documents

View All Documentation

100994

Sigma-Aldrich

Para Red

Dye content 95 %

Synonym(s):

1-(4-Nitrophenylazo)-2-naphthol, 1-(p-Nitrophenylazo)-2-naphthol

Sign Into View Organizational & Contract Pricing
All Photos(2)

About This Item

Linear Formula:
O2NC6H4N=NC10H6OH
CAS Number:
6410-10-2
Molecular Weight:
293.28
EC Number:
229-093-8
MDL number:
MFCD00003908
UNSPSC Code:
12171500
PubChem Substance ID:
24846529
NACRES:
NA.47

form

solid

Quality Level

100

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

Looking for similar products? Visit Product Comparison Guide

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.

Biochem/physiol Actions

Para Red may be used to make standards for analysis.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315,H319,H335

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

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
SHBR7071
SHBP4125
SHBM2902
MKCF4351
MKCC0212

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Z X Xu et al.
Journal of food science, 75(1), C49-C54 (2010-05-25)
In this article, we prepared a novel imprinted polymer by a room temperature ionic liquid-mediated surface molecular imprinting technique in combination with a sol-gel process. This polymer was characterized by static and kinetic adsorption experiments and exhibited good recognition ability
Constantinos K Zacharis et al.
Talanta, 84(2), 480-486 (2011-03-08)
This work reports a fast and simple liquid chromatographic method for the simultaneous determination of five banned fat-soluble synthetic colorants, namely Sudan I-IV and Para-Red, in spice samples. The analytes were successfully separated isocratically in less than 5 min on
Fabio Mazzotti et al.
Journal of agricultural and food chemistry, 56(1), 63-67 (2007-12-07)
A high-throughput mass spectrometric method is presented for the simultaneous detection of Sudan I, II, III, IV, and Para-Red azodyes in foodstuff. The method is based on the use of deuterium-labeled internal standards and atmospheric pressure chemical ionization (APCI) in

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service