CAS 12001-99-9PubChem CID 22504267
C.I. Pigment Green 18
- IUPAC name
- bis(chromium(3+));tris(oxygen(2-));dihydrate
- Molecular formula
- Cr2H4O5
- Molecular weight
- 188.02 g/mol
- Exact mass
- 187.886883 Da
- Topological polar surface area
- 5.0 Ų
- Hydrogen-bond donors
- 2
- Hydrogen-bond acceptors
- 5
- Covalent units
- 7
- Defined stereocentres
- 0
Also known as
Chromium hydroxide greenRV8FT8XF5RChromic oxide hydratedUNII-RV8FT8XF5R11958 GREENCHROME OXIDE (HYDRATED) GREENC.I. 77289Guignet'S green
8 more reported names
RefChem:122490CHROMIUM HYDROXIDE GREEN [INCI]601-657-1chromium(3+);oxygen(2-);dihydrateHydrated chromium sesquioxideCI 77289Viridian 3BCYYGBBNBGCVXEL-UHFFFAOYSA-N
Evidence from additional scientific databases
NIH PubChem PUG-View
Exact identifier match22504267
Attributed physical-property, hazard, environmental and use annotations.
- Physical Description: Dry Powder Source: EPA Chemical Data Reporting (CDR)
- Physical Description: Light green finely divided powder; [MSDSonline] A brilliant emerald-green pigment called Guignet's green; [Ullmann] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
- Note: This chemical does not meet GHS hazard criteria for 91.7% (11 of 12) of all reports. Source: European Chemicals Agency (ECHA)
- GHS Hazard Statements: Not Classified; Reported as not meeting GHS hazard criteria by 11 of 12 companies (only 8.3% companies provided GHS information). For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
- ECHA C&L Notifications Summary: Aggregated GHS information provided per 12 reports by companies from 2 notifications to the ECHA C&L Inventory.; Reported as not meeting GHS hazard criteria per 11 of 12 reports by companies.; There is 1 notification provided by 1 of 12 reports by companies with hazard statement code(s).; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
- Industry Uses: Pigment Source: EPA Chemical Data Reporting (CDR)
- Sources/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] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record
Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.
Additional source coverage and match status
| Source | Result | Checked |
|---|---|---|
| NIH PubChem PUG-View | Exact match | 2026-08-31 |
A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.
Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.