CHROMIUM HYDROXIDE GREEN

Description

Pigment Green 18 · CAS 12001-99-9 · Cr2H4O5. UNII RV8FT8XF5R. Color Additive Status: 73.1326; Color Additive Status: 73.2326.

Identification

CAS Registry Number	12001-99-9
PubChem CID	22504267
Molecular formula	Cr2H4O5
IUPAC name	bis(chromium(3+));tris(oxygen(2-));dihydrate
UNII (FDA)	RV8FT8XF5R

Computed Descriptors

Molecular Weight	188.02
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	5
Rotatable Bond Count	0
Exact Mass	187.886883
Monoisotopic Mass	187.886883
Topological Polar Surface Area	5
Heavy Atom Count	7
Formal Charge	0
Complexity	0

Physical & Chemical Properties

Color Additive Status	73.1326
Color Additive Status	73.2326

Physical description & handling notes

• Dry Powder
• Light green finely divided powder; [MSDSonline] A brilliant emerald-green pigment called Guignet's green; [Ullmann]
• Chromium Hydroxide Green
• Drugs, Cosmetics
• Externally applied drugs including eye area use. Externally applied cosmetics including eye area use.

Regulatory Status

Regulatory & Food Contact	FDA Regulatory Status of Color Additives: Drugs, Cosmetics CIR / INCI: Cosmetic colorant; Hair dyeing
GHS notification summary	91.7% (11 / 12)

GHS Hazard Classification

GHS notification summary	91.7% (11 / 12)

Documented Uses

• A purified colorant used to color various foods, drugs, and cosmetics; [MSDSonline] Hydrated chromium oxide green is a pigment similar to Guignet's green; it is prepared differently and has less intense color; [Ullmann]
• Cosmetics -> Cosmetic colorant; Hair dyeing

Synonyms

Chromium hydroxide green; 12001-99-9; RV8FT8XF5R; Chromic oxide hydrated; UNII-RV8FT8XF5R; 11958 GREEN; CHROME OXIDE (HYDRATED) GREEN; C.I. 77289; Guignet'S green; RefChem:122490; DTXSID70894251; CHROMIUM HYDROXIDE GREEN [INCI]; 601-657-1; chromium(3+);oxygen(2-);dihydrate; Hydrated chromium sesquioxide; CI 77289

Frequently Asked Questions

What are the CAS number and molecular formula of Pigment Green 18?

CAS 12001-99-9; molecular formula Cr2H4O5; molecular weight — g/mol.

What other names is Pigment Green 18 known by?

Chromium hydroxide green, 12001-99-9, RV8FT8XF5R, Chromic oxide hydrated, UNII-RV8FT8XF5R, 11958 GREEN.

What is the regulatory status of Pigment Green 18?

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

Is Pigment Green 18 classified as hazardous?

91.7% of GHS notifications report no hazard classification (11 of 12).

What are the key physical properties of Pigment Green 18?

Color Additive Status: 73.1326; Color Additive Status: 73.2326.

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.