Acid Green 25

Description

Acid Green 25 · CAS 4403-90-1 · C28H20N2Na2O8S2. UNII 8J6RDU8L9X. Melting Point: 455 to 460 °F (NTP, 1992); Melting Point: 235-238 °C; Solubility: 5 to 10 mg/mL at 70 °F (NTP, 1992).

Identification

CAS Registry Number	4403-90-1
PubChem CID	20431
Molecular formula	C28H20N2Na2O8S2
IUPAC name	disodium;5-methyl-2-[[4-(4-methyl-2-sulfonatoanilino)-9,10-dioxoanthracen-1-yl]amino]benzenesulfonate
UNII (FDA)	8J6RDU8L9X

Computed Descriptors

Molecular Weight	622.6
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	10
Rotatable Bond Count	4
Exact Mass	622.04564651
Monoisotopic Mass	622.04564651
Topological Polar Surface Area	189
Heavy Atom Count	42
Formal Charge	0
Complexity	1060

Physical & Chemical Properties

Melting Point	455 to 460 °F (NTP, 1992)
Melting Point	235-238 °C
Solubility	5 to 10 mg/mL at 70 °F (NTP, 1992)
Vapor Pressure	7.3X10-25 mm Hg at 25 °C
Color Additive Status	74.1205
Color Additive Status	74.2205
Color Additive Status	82.1205

Physical description & handling notes

• D & c green 5 appears as fine black or green powder. (NTP, 1992)
• Dark blue-green powder
• Green powder
• Slightly soluble in acetone, alcohol, pyridine. Insoluble in chloroform, toluene.
• In 2-methoxyethanol 30 mg/mL, ethanol 2 mg/mL, temperature not specified
• In water, 60 mg/mL, temperature not specified

Regulatory Status

Regulatory & Food Contact	FDA Regulatory Status of Color Additives: Drugs, Cosmetics, Devices CIR / INCI: Hair dyeing; Cosmetic colorant
GHS notification summary	59.7% (227 / 380)

GHS Hazard Classification

GHS notification summary	59.7% (227 / 380)
Reported hazard statements	H315 (10.3%), H319 (22.6%), H411 (11.1%), H412 (12.6%)

Documented Uses

• Used to dye paper, chromed leather, wool, silk and nylon (acid bath), to stain wood and to color anodized aluminum, urea-melamine resin and soap.
• Used to color nylon 66 (the copolymer of adipic acid and hexamethylenediamine) and/or nylon 6[poly-(e-caprolactam)] nonabsorbable surgical sutures for use in general surgery. ... Used for coloring drugs generally, including drugs intended for use in the area of the eye.
• Acid Green 25 is proposed for use in semi-permanent hair dye formulations as a direct dye at a maximum concentration of 0.3% in the finished cosmetic product.
• EPA Safer Chemical Functional Use Classes -> Colorants
• Safer Chemical Classes -> Yellow triangle - The chemical has met Safer Choice Criteria for its functional ingredient-class, but has some hazard profile issues
• Cosmetics -> Hair dyeing; Cosmetic colorant

Synonyms

Acid Green 25; 4403-90-1; D&C Green No. 5; Alizarin Cyanine Green F; Solway Green GA; Erionyl Green GL; Alizarine Green J; Aquamine Green GL; Alizarine Green CE; Alizarine Green CG; Airedale Green ACG; C.I. ACID GREEN 25; Diachromate Green G; Erio Fast Green GS; D & C Green No. 5; Anthraquinone Green G

Frequently Asked Questions

What are the CAS number and molecular formula of Acid Green 25?

CAS 4403-90-1; molecular formula C28H20N2Na2O8S2; molecular weight — g/mol.

What other names is Acid Green 25 known by?

Acid Green 25, 4403-90-1, D&C Green No. 5, Alizarin Cyanine Green F, Solway Green GA, Erionyl Green GL.

What is the regulatory status of Acid Green 25?

Documented regulatory listings: FDA Regulatory Status of Color Additives: Drugs, Cosmetics, Devices; CIR / INCI: Hair dyeing; Cosmetic colorant.

Is Acid Green 25 classified as hazardous?

59.7% of GHS notifications report no hazard classification (227 of 380).

What are the key physical properties of Acid Green 25?

Melting Point: 455 to 460 °F (NTP, 1992); Melting Point: 235-238 °C; Solubility: 5 to 10 mg/mL at 70 °F (NTP, 1992); Vapor Pressure: 7.3X10-25 mm Hg at 25 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.