Erythrosine - Revision history

MDerrick at 15:48, 25 February 2026

2026-02-25T15:48:17Z

← Older revision		Revision as of 11:48, 25 February 2026
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	== Description ==		== Description ==

	A brown powder that forms a cherry red synthetic dye solution with water. First discovered in 1876 by Kussamaul, erythrosine is an iodinate derivative of [[fluorescein]]. Early use of erythrosine was as a direct dye on [[wool]] and [[silk]]. It was also used in inks, lacquers, cosmetics, and as a lake pigment. However, because erythrosine was not colorfast in [[solar radiation\|sunlight]], its use as a textile dye was discontinued by the 1920s. It was approved as a food dye in 1906, and was popularly used in cherries, candies and cake decorating gels until it was banned in ~~1990~~.		A brown powder that forms a cherry red synthetic dye solution with water. First discovered in 1876 by Kussamaul, erythrosine is an iodinate derivative of [[fluorescein]]. Early use of erythrosine was as a direct dye on [[wool]] and [[silk]]. It was also used in inks, lacquers, cosmetics, and as a lake pigment. However, because erythrosine was not colorfast in [[solar radiation\|sunlight]], its use as a textile dye was discontinued by the 1920s. It was approved as a food dye in 1906, and was popularly used in cherries, candies and cake decorating gels until it was banned in 2025 (in the U.S).
	[[[SliderGallery rightalign\|erythrosine.jpg~Chemical structure]]]		[[[SliderGallery rightalign\|erythrosine.jpg~Chemical structure]]]
	== Synonyms and Related Terms ==		== Synonyms and Related Terms ==

MDerrick: /* Risks */

2026-02-24T21:25:39Z

Risks

← Older revision		Revision as of 17:25, 24 February 2026
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	== Risks ==		== Risks ==
	* Toxicity and carcinogenicity are being studied.		* Toxicity and carcinogenicity are being studied; lab studies show interactions with the thyroid
	* Millipore Sigma: [https://www.emdmillipore.com/US/en/product/msds/MDA_CHEM-115936?ReferrerURL=https%3A%2F%2Fsearch.yahoo.com%2F&bd=1 SDS]		* Millipore Sigma: [https://www.emdmillipore.com/US/en/product/msds/MDA_CHEM-115936?ReferrerURL=https%3A%2F%2Fsearch.yahoo.com%2F&bd=1 SDS]

MDerrick at 21:20, 24 February 2026

2026-02-24T21:20:40Z

← Older revision		Revision as of 17:20, 24 February 2026
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	A brown powder that forms a cherry red synthetic dye solution with water. First discovered in 1876 by Kussamaul, erythrosine is an iodinate derivative of [[fluorescein]]. Early use of erythrosine was as a direct dye on [[wool]] and [[silk]]. It was also used in inks, lacquers, cosmetics, and as a lake pigment. However, because erythrosine was not colorfast in [[solar radiation\|sunlight]], its use as a textile dye was discontinued by the 1920s. It was approved as a food dye in 1906, and was popularly used in cherries, candies and cake decorating gels until it was banned in 1990.		A brown powder that forms a cherry red synthetic dye solution with water. First discovered in 1876 by Kussamaul, erythrosine is an iodinate derivative of [[fluorescein]]. Early use of erythrosine was as a direct dye on [[wool]] and [[silk]]. It was also used in inks, lacquers, cosmetics, and as a lake pigment. However, because erythrosine was not colorfast in [[solar radiation\|sunlight]], its use as a textile dye was discontinued by the 1920s. It was approved as a food dye in 1906, and was popularly used in cherries, candies and cake decorating gels until it was banned in 1990.
	[[[SliderGallery rightalign\|erythrosine.jpg~Chemical structure]]]		[[[SliderGallery rightalign\|erythrosine.jpg~Chemical structure]]]

	== Synonyms and Related Terms ==		== Synonyms and Related Terms ==

	erythrosine B; erythrosine BS; Acid Red 51; CI 45430; FD&C Red No.3; Food Red 14; Pigment Red 172 (aluminum salt); Solvent Red 140; érythrosine (Fr.); eritrosina (Esp., Port.); sodium iodeosin; erythrosin		erythrosine B; erythrosine BS; Acid Red 51; CI 45430; FD&C Red No.3; Food Red 14; Pigment Red 172 (aluminum salt); Solvent Red 140; érythrosine (Fr.); eritrosina (Esp., Port.); sodium iodeosin; erythrosin

	== Risks ==		== Risks ==

	* Toxicity and carcinogenicity are being studied.		* Toxicity and carcinogenicity are being studied.
	* ~~MilliporeSigma~~: [https://www.emdmillipore.com/US/en/product/msds/MDA_CHEM-115936?ReferrerURL=https%3A%2F%2Fsearch.yahoo.com%2F&bd=1 SDS]		* Millipore Sigma: [https://www.emdmillipore.com/US/en/product/msds/MDA_CHEM-115936?ReferrerURL=https%3A%2F%2Fsearch.yahoo.com%2F&bd=1 SDS]

	==Physical and Chemical Properties==		==Physical and Chemical Properties==

	* Soluble in water, ethanol.		* Soluble in water, ethanol.
	* An aqueous solution of erythrosine will form a yellow-brown precipitate when drops of HCl are added and a red precipitate when drops of NaOH solution are added.		* An aqueous solution of erythrosine will form a yellow-brown precipitate when drops of HCl are added and a red precipitate when drops of NaOH solution are added.

MDerrick: /* Description */

2026-02-24T21:19:54Z

Description

← Older revision		Revision as of 17:19, 24 February 2026
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	== Description ==		== Description ==

	A brown powder that forms a cherry red synthetic dye solution with water. First discovered in 1876 by Kussamaul, erythrosine is an iodinate derivative of [[fluorescein]]. ~~It is used~~ as a direct dye on [[wool]] and [[silk]]. ~~Erythrosine is~~ also used in inks, lacquers, cosmetics, and as a lake pigment. ~~It is~~ not colorfast in [[solar radiation\|sunlight]].		A brown powder that forms a cherry red synthetic dye solution with water. First discovered in 1876 by Kussamaul, erythrosine is an iodinate derivative of [[fluorescein]]. Early use of erythrosine was as a direct dye on [[wool]] and [[silk]]. It was also used in inks, lacquers, cosmetics, and as a lake pigment. However, because erythrosine was not colorfast in [[solar radiation\|sunlight]], its use as a textile dye was discontinued by the 1920s. It was approved as a food dye in 1906, and was popularly used in cherries, candies and cake decorating gels until it was banned in 1990.
			[[[SliderGallery rightalign\|erythrosine.jpg~Chemical structure]]]

	~~[[[SliderGallery rightalign\|erythrosine.jpg~Chemical structure]]]~~
	== Synonyms and Related Terms ==		== Synonyms and Related Terms ==

MDerrick: /* Physical and Chemical Properties */

2026-02-24T21:13:15Z

Physical and Chemical Properties

← Older revision		Revision as of 17:13, 24 February 2026
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	* Maximum absorption wavelength = 524 nm.		* Maximum absorption wavelength = 524 nm.
	* The fluorescence of erythrosine changes with pH. It is colorless at pH 4.0 changing to a fluorescent yellow-green at pH 4.5		* The fluorescence of erythrosine changes with pH. It is colorless at pH 4.0 changing to a fluorescent yellow-green at pH 4.5
			* Composition = C20H6I4Na2O5 (mol. wt. = 879.86 g/mol.)
	~~{\| class~~=~~"wikitable"~~		* CAS = 16423-68-0
	\|-
	~~! scope="row"\| Composition~~
	\| C20H6I4Na2O5
	\|-
	~~! scope="row"\| CAS~~
	~~\| 16423-68-0~~
	\|-
	~~! scope="row"\| Molecular Weight~~
	\| mol. wt. = 879.86
	\|}

	==Resources and Citations==		==Resources and Citations==

MDerrick at 21:09, 24 February 2026

2026-02-24T21:09:24Z

← Older revision		Revision as of 17:09, 24 February 2026
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	* M.Ballard (ed.), ''Important Early Synthetic Dyes. Chemistry, Constitution, Date, Properties.'' Conservation Analytical Laboratory, Smithsonian Institution, 1991.		* M.Ballard (ed.), ''Important Early Synthetic Dyes. Chemistry, Constitution, Date, Properties.'' Conservation Analytical Laboratory, Smithsonian Institution, 1991.

	* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993		* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993

	* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 3734		* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 3734

	* T.Schafer, C. Norton, V.Blyth-Hill, "The Efficacy of Using Boards Containing Zeolites in Passepartout for Works of Art on Paper, WAAC Newsletter, 22(1):14, 2000. -erythrosine fades rapidly		* T.Schafer, C. Norton, V.Blyth-Hill, "The Efficacy of Using Boards Containing Zeolites in Passepartout for Works of Art on Paper, WAAC Newsletter, 22(1):14, 2000. -erythrosine fades rapidly

	* Colour Index International online at www.colour-index.org Comment: discoverer = Kussmaul; CAS=16423-68-0, 12227-78-0, 15905-32-5		* Colour Index International online at www.colour-index.org Comment: discoverer = Kussmaul; CAS=16423-68-0, 12227-78-0, 15905-32-5

	* ''CRC Handbook of Chemistry and Physics'', Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: The fluorescence of erythrosine changes with pH. It is colorless at pH 4.0 changing to a fluorescescent yellow-green at pH 4.5		* ''CRC Handbook of Chemistry and Physics'', Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: The fluorescence of erythrosine changes with pH. It is colorless at pH 4.0 changing to a fluorescescent yellow-green at pH 4.5

	* Sigma Dyes, Stains and Natural Pigments, Infrared Library, Nicolet, 1991-1995 Comment: OMNIC for Erythrosine B: formula= C20H8I4O5, CAS= 15905-32-5 and for sodium salt of Erythrosine B: formula=C20H6I4Na2O5, CAS= 568-63-8		* Sigma Dyes, Stains and Natural Pigments, Infrared Library, Nicolet, 1991-1995 Comment: OMNIC for Erythrosine B: formula= C20H8I4O5, CAS= 15905-32-5 and for sodium salt of Erythrosine B: formula=C20H6I4Na2O5, CAS= 568-63-8
			* Wikipedia: [https://en.wikipedia.org/wiki/Erythrosine Erythrosine] Accessed Feb. 2026


	[[Category:Materials database]]		[[Category:Materials database]]

MDerrick at 19:16, 5 August 2022

2022-08-05T19:16:12Z

← Older revision		Revision as of 15:16, 5 August 2022
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	A brown powder that forms a cherry red synthetic dye solution with water. First discovered in 1876 by Kussamaul, erythrosine is an iodinate derivative of [[fluorescein]]. It is used as a direct dye on [[wool]] and [[silk]]. Erythrosine is also used in inks, lacquers, cosmetics, and as a lake pigment. It is not colorfast in [[solar radiation\|sunlight]].		A brown powder that forms a cherry red synthetic dye solution with water. First discovered in 1876 by Kussamaul, erythrosine is an iodinate derivative of [[fluorescein]]. It is used as a direct dye on [[wool]] and [[silk]]. Erythrosine is also used in inks, lacquers, cosmetics, and as a lake pigment. It is not colorfast in [[solar radiation\|sunlight]].

			[[[SliderGallery rightalign\|erythrosine.jpg~Chemical structure]]]
	== Synonyms and Related Terms ==		== Synonyms and Related Terms ==

	erythrosine B; erythrosine BS; Acid Red 51; CI 45430; FD&C Red No.3; Food Red 14; Pigment Red 172 (aluminum salt); Solvent Red 140; érythrosine (Fr.); eritrosina (Esp., Port.); sodium iodeosin; erythrosin		erythrosine B; erythrosine BS; Acid Red 51; CI 45430; FD&C Red No.3; Food Red 14; Pigment Red 172 (aluminum salt); Solvent Red 140; érythrosine (Fr.); eritrosina (Esp., Port.); sodium iodeosin; erythrosin

	~~[[[SliderGallery rightalign\|erythrosine.jpg~Chemical structure]]]~~		== Risks ==

	== ~~Other Properties~~ ==

	~~Soluble in water, ethanol~~. ~~An aqueous solution of erythrosine will form a yellow~~-~~brown precipitate when drops of HCl are added and a red precipitate when drops of NaOH solution are added~~.		* Toxicity and carcinogenicity are being studied.
			* MilliporeSigma: [https://www.emdmillipore.com/US/en/product/msds/MDA_CHEM-115936?ReferrerURL=https%3A%2F%2Fsearch.yahoo.com%2F&bd=1 SDS]

	~~Maximum absorption wavelength~~ = ~~524 nm.~~		==Physical and Chemical Properties==

	The fluorescence of erythrosine changes with pH. It is colorless at pH 4.0 changing to a ~~fluorescescent~~ yellow-green at pH 4.5		* Soluble in water, ethanol.
			* An aqueous solution of erythrosine will form a yellow-brown precipitate when drops of HCl are added and a red precipitate when drops of NaOH solution are added.
			* Maximum absorption wavelength = 524 nm.
			* The fluorescence of erythrosine changes with pH. It is colorless at pH 4.0 changing to a fluorescent yellow-green at pH 4.5

	{\| class="wikitable"		{\| class="wikitable"
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	\|}		\|}

	== ~~Hazards~~ and ~~Safety~~ ==		==Resources and Citations==

	~~Toxicity and carcinogenicity are being studied.~~

	~~Mallinckrodt Baker: [http://www.jtbaker.com/msds/englishhtml/e1675.htm MSDS]~~

	~~== Additional Information ==~~

	~~M.Ballard (ed.), ''Important Early Synthetic Dyes. Chemistry, Constitution, Date, Properties.'' Conservation Analytical Laboratory, Smithsonian Institution, 1991.~~

	~~== Sources Checked for Data in Record ==~~		* M.Ballard (ed.), ''Important Early Synthetic Dyes. Chemistry, Constitution, Date, Properties.'' Conservation Analytical Laboratory, Smithsonian Institution, 1991.

	* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993		* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993
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	* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 3734		* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 3734

	* ~~External source or communication Comment:~~ T.Schafer, C. Norton, V.Blyth-Hill, "The Efficacy of Using Boards Containing Zeolites in Passepartout for Works of Art on Paper, WAAC Newsletter, 22(1):14, 2000. -erythrosine fades rapidly		* T.Schafer, C. Norton, V.Blyth-Hill, "The Efficacy of Using Boards Containing Zeolites in Passepartout for Works of Art on Paper, WAAC Newsletter, 22(1):14, 2000. -erythrosine fades rapidly

	* Colour Index International online at www.colour-index.org Comment: discoverer = Kussmaul; CAS=16423-68-0, 12227-78-0, 15905-32-5		* Colour Index International online at www.colour-index.org Comment: discoverer = Kussmaul; CAS=16423-68-0, 12227-78-0, 15905-32-5

Jruggiero: Text replace - "== Authority ==" to "== Sources Checked for Data in Record =="

2016-05-01T02:17:53Z

Text replace - "== Authority ==" to "== Sources Checked for Data in Record =="

← Older revision		Revision as of 22:17, 30 April 2016
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	M.Ballard (ed.), ''Important Early Synthetic Dyes. Chemistry, Constitution, Date, Properties.'' Conservation Analytical Laboratory, Smithsonian Institution, 1991.		M.Ballard (ed.), ''Important Early Synthetic Dyes. Chemistry, Constitution, Date, Properties.'' Conservation Analytical Laboratory, Smithsonian Institution, 1991.

	== ~~Authority~~ ==		== Sources Checked for Data in Record ==

	* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993		* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993

GEthier: /* Description */

2014-01-15T14:49:06Z

Description

← Older revision		Revision as of 10:49, 15 January 2014
Line 1:		Line 1:
	== Description ==		== Description ==

	A brown powder that forms a cherry red synthetic dye solution with water. First discovered in 1876 by Kussamaul, erythrosine is an iodinate derivative of [~~http://cameo.mfa.org/materials/fullrecord.asp?name=fluorescein~~ fluorescein]. It is used as a direct dye on [~~http://cameo.mfa.org/materials/fullrecord.asp?name=wool~~ wool] and [~~http://cameo.mfa.org/materials/fullrecord.asp?name=silk~~ silk]. Erythrosine is also used in inks, lacquers, cosmetics, and as a lake pigment. It is not colorfast in [~~http://cameo.mfa.org/materials/fullrecord.asp?name=~~solar~~%20radiation~~ sunlight].		A brown powder that forms a cherry red synthetic dye solution with water. First discovered in 1876 by Kussamaul, erythrosine is an iodinate derivative of [[fluorescein]]. It is used as a direct dye on [[wool]] and [[silk]]. Erythrosine is also used in inks, lacquers, cosmetics, and as a lake pigment. It is not colorfast in [[solar radiation\|sunlight]].

	== Synonyms and Related Terms ==		== Synonyms and Related Terms ==

Unknown user at 12:49, 24 July 2013

2013-07-24T12:49:55Z

New page

== Description ==

A brown powder that forms a cherry red synthetic dye solution with water. First discovered in 1876 by Kussamaul, erythrosine is an iodinate derivative of [http://cameo.mfa.org/materials/fullrecord.asp?name=fluorescein fluorescein]. It is used as a direct dye on [http://cameo.mfa.org/materials/fullrecord.asp?name=wool wool] and [http://cameo.mfa.org/materials/fullrecord.asp?name=silk silk]. Erythrosine is also used in inks, lacquers, cosmetics, and as a lake pigment. It is not colorfast in [http://cameo.mfa.org/materials/fullrecord.asp?name=solar%20radiation sunlight].

== Synonyms and Related Terms ==

erythrosine B; erythrosine BS; Acid Red 51; CI 45430; FD&C Red No.3; Food Red 14; Pigment Red 172 (aluminum salt); Solvent Red 140; érythrosine (Fr.); eritrosina (Esp., Port.); sodium iodeosin; erythrosin

[[[SliderGallery rightalign|erythrosine.jpg~Chemical structure]]]

== Other Properties ==

Soluble in water, ethanol. An aqueous solution of erythrosine will form a yellow-brown precipitate when drops of HCl are added and a red precipitate when drops of NaOH solution are added.

Maximum absorption wavelength = 524 nm.

The fluorescence of erythrosine changes with pH. It is colorless at pH 4.0 changing to a fluorescescent yellow-green at pH 4.5

{| class="wikitable"
|-
! scope="row"| Composition
| C20H6I4Na2O5
|-
! scope="row"| CAS
| 16423-68-0
|-
! scope="row"| Molecular Weight
| mol. wt. = 879.86
|}

== Hazards and Safety ==

Toxicity and carcinogenicity are being studied.

Mallinckrodt Baker: [http://www.jtbaker.com/msds/englishhtml/e1675.htm MSDS]

== Additional Information ==

M.Ballard (ed.), ''Important Early Synthetic Dyes. Chemistry, Constitution, Date, Properties.'' Conservation Analytical Laboratory, Smithsonian Institution, 1991.

== Authority ==

* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993

* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 3734

* External source or communication Comment: T.Schafer, C. Norton, V.Blyth-Hill, "The Efficacy of Using Boards Containing Zeolites in Passepartout for Works of Art on Paper, WAAC Newsletter, 22(1):14, 2000. -erythrosine fades rapidly

* Colour Index International online at www.colour-index.org Comment: discoverer = Kussmaul; CAS=16423-68-0, 12227-78-0, 15905-32-5

* ''CRC Handbook of Chemistry and Physics'', Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: The fluorescence of erythrosine changes with pH. It is colorless at pH 4.0 changing to a fluorescescent yellow-green at pH 4.5

* Sigma Dyes, Stains and Natural Pigments, Infrared Library, Nicolet, 1991-1995 Comment: OMNIC for Erythrosine B: formula= C20H8I4O5, CAS= 15905-32-5 and for sodium salt of Erythrosine B: formula=C20H6I4Na2O5, CAS= 568-63-8

[[Category:Materials database]]