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860-22-0

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Identification

Name
Acid Blue 74
CAS
860-22-0
Synonyms
5,5-INDIGO DISULFONIC ACID
5,5'-INDIGODISULFONIC ACID DISODIUM SALT
ACID BLUE 74
BLUE ACID 74
CARMINE BLUE
CI 73015
CI NO 73015
Disodium 5,5'-(2-(1,3-dihydro-3-oxo-2H-indazol-2-ylidene)-1,2-dihydro-3H-indol-3-one)disulphonate
E132
FD AND C BLUE 2
FD AND C BLUE NO 2
FDC BLUE NO 2
food blue 1
FOOD BLUE NO 2
INDIGO-5,5'-DISULFONIC ACID DISODIUM SALT
INDIGO CARMINE
INDIGO DISULFONATE
INDIGOTINE
INDIGOTINE 1
INDIGOTINE 1A
EINECS(EC#)
212-728-8
Molecular Formula
C16H8N2Na2O8S2
MDL Number
MFCD00005723
Molecular Weight
466.35
MOL File
860-22-0.mol

Chemical Properties

Appearance
purple powder
mp 
>300°C
density 
1.01 g/mL at 20 °C
refractive index 
n20/D 1.335
Colour Index 
73015
Stability:
Stable. Incompatible with strong oxidizing agents.
Water Solubility 
1 g/100 mL (25 ºC)
Sensitive 
Light Sensitive
Merck 
14,4944
BRN 
4103904
Uses
Indigo Carmine (FD&C Blue #2) is a colorant. It has poor ph stability in that after 1 week at ph 3 and 5 it will appreciably fade, at ph 7 considerably fade, and at ph 8 fade completely. It is the least soluble of all food colors, with a solubility of 1.6 g in 100 ml of water at 25°c. Complete fading occurs in alkalis such as 10% sodium carbonate and 10% sodium hydroxide, with fading also occurring in 10% sugar systems. It has very poor light stability and oxidation stability, and moderate stability to heat; it has a deep blue hue with poor tinctorial strength. It is the only food color that has good resistance to reducing agents, but has very poor compatibility with food components. The major use is in pet food, but it is also used in candies, confections, and baked goods. The common name is indigotine.
CAS DataBase Reference
860-22-0(CAS DataBase Reference)
EPA Substance Registry System
860-22-0(EPA Substance)

Safety Data

Hazard Codes 
Xn,Xi
Risk Statements 
R22:Harmful if swallowed.
R36/37/38:Irritating to eyes, respiratory system and skin .
Safety Statements 
S22:Do not breathe dust .
S24/25:Avoid contact with skin and eyes .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S27:Take off immediately all contaminated clothing .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
WGK Germany 
3

RTECS 
DU3000000

HS Code 
32041200

Raw materials And Preparation Products

Hazard Information

General Description
Indigo to dark blue powder.
Reactivity Profile
Sensitive to light. Very sensitive to oxidizing agents. Color is readily discharged by nitric acid, chlorates, etc. Color of aqueous solutions fades on standing.
Air & Water Reactions
Water soluble.
Fire Hazard
Flash point data for this compound is not available, but INDIGO CARMINE is probably combustible.

Material Safety Data Sheet(MSDS)

Spectrum Detail

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