Difference between revisions of "Indigo carmine"

Latest revision as of 10:30, 15 September 2022

Description

A dark bluish purple, synthetic, water soluble version of Indigo. Indigo carmine, or Saxon blue, is composed of the sodium sulfonate salt of Indigotin. First prepared in 1740 by Barth, it was the earliest synthetic Acid dye. Indigo carmine was used to color Wool and Silk. It is not lightfast and has poor washfastness. Indigo carmine is still used for coloring nylon sutures, food, and drugs. It is also used as a biological stain and as a detection reagent for nitrates and chlorates.

Chemical structure

Synonyms and Related Terms

Pigment Blue 63 (aluminum salt); Natural Blue 2; Acid Blue 74; CI 73015; sodium indigotin disulfonate; indigo disulphonic acid (Br.); indigocarmim (Port.); indigocarmine; soluble indigo blue; indigotine

Risks

ThermoFisher: SDS

Physical and Chemical Properties

Soluble in water. Slightly soluble in ethanol. Discolors in acids.

Composition	C16H10N2O8S2.2Na
CAS	860-22-0
Melting Point	> 300 C
Molecular Weight	mol. wt. = 466.36

Resources and Citations

A.Scharff, 'Synthetic dyestuffs for textiles and their fastness to washing', ICOM-CC Preprints Lyon, Getty Conservation Institute, Los Angeles, 1999

Colour Index International online at www.colour-index.org Comment: Acid Blue 74; CI 73015

Helmut Schweppe, Schweppe color collection index and information book Comment: CI 75781 and 73015

The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 4978

@@ Line 1: / Line 1: @@
 == Description ==
-A dark bluish purple, synthetic, water soluble version of [http://cameo.mfa.org/materials/fullrecord.asp?name=indigo indigo]. Indigo carmine, or Saxon blue, is composed of the sodium sulfonate salt of [http://cameo.mfa.org/materials/fullrecord.asp?name=indigotin indigotin]. First prepared in 1740 by Barth, it was the earliest synthetic [http://cameo.mfa.org/materials/fullrecord.asp?name=acid%20dye acid dye]. Indigo carmine was used to color [http://cameo.mfa.org/materials/fullrecord.asp?name=wool wool] and [http://cameo.mfa.org/materials/fullrecord.asp?name=silk silk]. It is not lightfast and has poor washfastness. Indigo carmine is still used for coloring [http://cameo.mfa.org/materials/fullrecord.asp?name=nylon%20fiber nylon] sutures, food, and drugs. It is also used as a biological stain and as a detection reagent for nitrates and chlorates.
+A dark bluish purple, synthetic, water soluble version of [[indigo]]. Indigo carmine, or Saxon blue, is composed of the sodium sulfonate salt of [[indigotin]]. First prepared in 1740 by Barth, it was the earliest synthetic [[acid dye]]. Indigo carmine was used to color [[wool]] and [[silk]]. It is not lightfast and has poor washfastness. Indigo carmine is still used for coloring [[nylon fiber|nylon]] sutures, food, and drugs. It is also used as a biological stain and as a detection reagent for nitrates and chlorates.
+[[[SliderGallery rightalign|indigo carmine.jpg~Chemical structure]]]
 == Synonyms and Related Terms ==
 Pigment Blue 63 (aluminum salt); Natural Blue 2; Acid Blue 74; CI 73015; sodium indigotin disulfonate; indigo disulphonic acid (Br.); indigocarmim (Port.); indigocarmine; soluble indigo blue; indigotine
-[[[SliderGallery rightalign|indigo carmine.jpg~Chemical structure]]]
+== Risks ==
+* ThermoFisher: [https://www.fishersci.com/store/msds?partNumber=AC157440250&productDescription=INDIGO+CARMINE%2C+HIGH+PUR+25GR&vendorId=VN00032119&countryCode=US&language=en SDS]
-== Other Properties ==
+==Physical and Chemical Properties==
 Soluble in water. Slightly soluble in ethanol. Discolors in acids.
@@ Line 22: / Line 24: @@
 |-
 ! scope="row"| Melting Point
-| > 300
+| > 300 C
 |-
 ! scope="row"| Molecular Weight
@@ Line 28: / Line 30: @@
 |}
-== Hazards and Safety ==
+==Resources and Citations==
-Mallinckrodt Baker: [http://www.jtbaker.com/msds/englishhtml/i1440.htm MSDS]
-== Additional Information ==
-A.Scharff, "Synthetic dyestuffs for textiles and their fastness to washing" in ICOM Preprints, Lyon, 1999. p.654-660.
-== Authority ==
-* A.Scharff, A.Scharff, 'Synthetic dyestuffs for textiles and their fastness to washing', ''ICOM-CC Preprints'' Lyon, Getty Conservation Institute, Los Angeles, 1999
+* A.Scharff, 'Synthetic dyestuffs for textiles and their fastness to washing', ''ICOM-CC Preprints'' Lyon, Getty Conservation Institute, Los Angeles, 1999
 * Colour Index International online at www.colour-index.org   Comment: Acid Blue 74; CI 73015
-* Helmut Schweppe, Helmut Schweppe, Schweppe color collection index and information book  Comment: CI 75781 and 73015
+* Helmut Schweppe, Schweppe color collection index and information book  Comment: CI 75781 and 73015
 * ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983  Comment: entry 4978