Basic information
- Standard SMILES
O=C([O-])c1ccccc1-c1c2cc(Br)c(=O)c(Br)c-2oc2c(Br)c([O-])c(Br)cc12.[Na+].[Na+]- InChIKey
SEACYXSIPDVVMV-UHFFFAOYSA-L- Molecular formula
- C20H6Br4Na2O5
- Average molar mass
- 691.9 g/mol
Overview
Eosin is a red crystalline powder. (NTP, 1992)
Names & identifiers
- Preferred name
- Eosin
- IUPAC
- disodium;2-(2,4,5,7-tetrabromo-3-oxido-6-oxoxanthen-9-yl)benzoate
Names & synonyms
Acid red 87EosinEosin yellowishEosine YellowishEosineSodium eosineBromo acidEosine YEosine GEosin YSBromofluoresceinSodium eosinate
Show more names
Bronze BromoCertiqual EosineBromo FluoresceinEosine AEosine JEosine BSEosine DAEosine FA
Database identifiers
- CAS
17372-87-1、548-26-5- PubChem CID
- 11048
- DTXSID
DTXSID901015574- ChEMBL
CHEMBL408917、CHEMBL411675- ChEBI
CHEBI:52053- UNII
- TDQ283MPCW
- EC Number
- 241-409-6、611-203-4
- Nikkaji
- J79.244F
Properties
Computed structural properties
- Topological polar surface area
- 89.5 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 5
- Rotatable bonds
- 1
- Heavy atoms
- 31
- Formal charge
- 0
- Complexity
- 796
Experimental & physicochemical properties
Chemical ClassesDyes -> Di- and Triaryl Dyes
CosmeticsHair dyeing; Cosmetic colorant
Food AdditivesDrugs, Cosmetics -> FDA Regulatory Status of Color Additives
Solubilitygreater than or equal to 100 mg/mL at 70 °F (NTP, 1992)
Melting Point572 °F (decomposes) (NTP, 1992)
Physical Description
Eosin is a red crystalline powder. (NTP, 1992)
Red with a bluish tinge or brownish-red solid; [Merck Index]
Safety & regulation
GHS classification
GHS Classification
This chemical does not meet GHS hazard criteria for 7% (47 of 671) of reports.
Warning
H319 (87%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
P264+P265, P280, P305+P351+P338, and P337+P317 (click each P-code to see the statement)
Aggregated GHS information provided per 671 reports by companies from 12 notifications to the ECHA C&L Inventory.
This chemical does not meet GHS hazard criteria for 50% (1 of 2) of reports.
Hazard information
Regulatory Information
Chemical: Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 2',4',5',7'-tetrabromo-3',6'-dihydroxy-, disodium salt
REACH registered substance: Disodium 2-(2,4,5,7-tetrabromo-6-oxido-3-oxoxanthen-9-yl)benzoate (EC: 241-409-6)
Eosin disodium salt: Does not have an individual approval but may be used under an appropriate group standard
C.I. Acid red 87: Does not have an individual approval but may be used under an appropriate group standard
Fire HazardsFlash point data for this chemical are not available; however, it is probably combustible. (NTP, 1992)
Health HazardsSYMPTOMS: Symptoms of exposure to this chemical include cheilitis, facial dermatitis and stomatitis.
Hazards SummaryMay cause facial dermatitis; [NTP] A moderate eye irritant; [Sigma-Aldrich MSDS]
Reactive GroupEsters, Sulfate Esters, Phosphate Esters, Thiophosphate Esters, and Borate Esters
Air and Water ReactionsWater soluble.
Hazard Classes and CategoriesEye Irrit. 2 (87%)
Safety & protection
Fire FightingFires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. (NTP, 1992)
First Aid
EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.
Nonfire Spill Response
SMALL SPILLS AND LEAKAGE: If you spill this chemical, you should dampen the solid spill material with water, then transfer the dampened material to a suitable container. Use absorbent paper dampened with water to pick up any remaining material. Seal your contaminated clothing and the absorbent paper in a vapor-tight plastic bag for eventual disposal. Wash all contaminated surfaces with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
Personal Protective Equipment (PPE)
RECOMMENDED RESPIRATOR: Where the neat test chemical is weighed and diluted, wear a NIOSH-approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter. (NTP, 1992)
Chemistry & industry
Pharmacology
ATC Code
D - Dermatologicals
QD - Dermatologicals
MeSH Pharmacological Classification
Chemicals that emit light after excitation by light. The wave length of the emitted light is usually longer than that of the incident light. Fluorochromes are substances that cause fluorescence in other substances, i.e., dyes used to mark or label other compounds with fluorescent tags.
Uses & manufacturing
Uses
Permitted for use as an inert ingredient in non-food pesticide products; [EPA] Used as a biological stain and dye for red inks, wool, silk, drugs, cosmetics, and paper; [Merck Index] Also used as a reagent for the spectrophotometric determination of silver (sub-microgram amounts) and for coloring motor fuels; [NTP]
Pulp and Paper Processing [Category: Industry]
Use Classification
Food Additives -> COLOUR -> JECFA Functional Classes
Food Additives -> COLOUR -> JECFA Functional Classes
Food Additives -> COLOUR -> JECFA Functional Classes
Food Additives -> COLOUR -> JECFA Functional Classes
Food Additives -> COLOUR -> JECFA Functional Classes
Cosmetics -> Hair dyeing; Cosmetic colorant
Related reactions
3 records
Linked notes
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