Indigo CAS#482-89-3

CAS Number: 482-89-3
Chemical Formula: C16H10N2O2
Synonyms:

(2,2’-biindoline)-3,3’-dione
(2,2'-Biindoline)-3,3'-dione
d+cblueno6

Appearance: Blue Powder

MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

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Indigo CAS#482-89-3

Indigo, known chemically as indigotin, is a common blue dye that has been highly valued throughout history and has played a major role in trade and commerce since ancient times. The term indigo is often used to describe many blue dyes produced from a number of plants. For example, woad, a blue dye obtained from the plant Isatis tinctoria, was used throughout the Mediterannean and Europe and is often identified as indigo. True indigo comes from the leguminous plant of the genus Indigofera.
The Indigofera genus includes several hundred species, and indigo has been obtained from a number of these, but the dominant species for the dye are Indigofera tinctoria grown mainly in India and tropical Asia and Indigofera suff ructiosa from the tropical Americas. The name indigo comes from the Greek indikon and Latin indicum meaning “dye from India.” There is evidence that indigo was used several thou sand years b.c.e. Persian rugs containing indigo color exist from several thousand years b.c.e. Textile artifacts from Egyptian tombs provide evidence of indigo’s use by royalty from as far back as 2500 b.c.e. The writings of Herodotus from approximately 450 b.c.e. mention indigo’s use in the Mediterranean area.

Indigo Chemical Properties

Melting point	>300 °C(lit.)
Boiling point	405.51°C (rough estimate)
density	1.01 g/mL at 20 °C
vapor pressure	0Pa at 100℃
refractive index	1.5800 (estimate)
Fp	>220℃
storage temp.	Sealed in dry,Room Temperature
solubility	DMSO (Slightly, Heated, Sonicated), DMF (Slightly)
pka	-3.83±0.20(Predicted)
form	Powder
Colour Index	73000
color	Dark blue to violet
Water Solubility	<0.1 g/100 mL
ε(extinction coefficient)	≥8000 at 599-605nm in chloroform
λmax	602 nm
Merck	14,4943
BRN	88275
Stability:	Stable. Incompatible with strong oxidizing agents.
Major Application	diagnostic assay manufacturing hematology histology
Cosmetics Ingredients Functions	COLORANT
InChI	1S/C16H10N2O2/c19-15-9-5-1-3-7-11(9)17-13(15)14-16(20)10-6-2-4-8-12(10)18-14/h1-8,17-18H/b14-13+
InChIKey	COHYTHOBJLSHDF-BUHFOSPRSA-N
SMILES	O=C1C(\Nc2ccccc12)=C3/Nc4ccccc4C3=O
LogP	2.7 at 23℃
CAS DataBase Reference	482-89-3(CAS DataBase Reference)
NIST Chemistry Reference	c.i. Vat blue 1(482-89-3)
EPA Substance Registry System	C.I. Vat Blue 1 (482-89-3)

Safety Information

Hazard Codes	Xi,Xn
Risk Statements	36/38-36/37/38-48/20/21/22
Safety Statements	26-36
RIDADR	UN 3264 8/PG 3
WGK Germany	1
RTECS	DU2988400
TSCA	TSCA listed
HS Code	32041510
Storage Class	11 - Combustible Solids
Hazard Classifications	Eye Irrit. 2 Skin Irrit. 2 STOT SE 3
Hazardous Substances Data	482-89-3(Hazardous Substances Data)
Toxicity	LD50 oral in mouse: > 32gm/kg

Product Application Of Indigo CAS#482-89-3

TEST ITEMS	SPECIFICATION
APPEARANCE	BLUE POWDER
SHADE	GREENISH
HEAT RESISTANCE	180 °C min
LIGHT FASTNESS	7
ACID RESISTANCE	3
ALKALI RESISTANCE	4
FASTNESS TO BLEEDING	4
OIL ABSORPTION	40-50%
SPECIFIC SURFACE	27 m 2 /g
DENSITY	1.60 g/cm 3
RESIDUE ON 80 MESH	5.0% max
WATER SOLUBLE	1.0% max
VOLATITE 105 °C	1.0% max
TINTING STRENGTH	100-105 %