Agent Name

Fluorescein sodium

CAS Number

518-47-8

Formula

C20-H10-O5.2Na

Major Category

Dyes

Synonyms

3',6'-Dihydroxyspiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, disodium salt; CI 45350; CI 45350 (Na salt); D & C Yellow No. 8; Disodium 2-(3-oxo-6-oxidoxanthen-9-yl)benzoate; Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 3',6'-dihydroxy-, sodium salt (1:2); 11824 Yellow; 12417 Yellow; 9-o-Carboxyphenyl-6-hydroxy-3-isoxanthone, disodium salt; Acid Yellow 73; Aizen Uranine; Ak-Fluor; Basacid Yellow 226; C.I. 45350; C.I. Acid Yellow 73; Calcocid Uranine B4315; Certiqual Fluoresceine; D&C Yellow No. 8; Disodium 6-hydroxy-3-oxo-9-xanthene-o-benzoate; Fluor-I-Strip; Fluor-I-strip A.T.; Fluorescein LT; Fluorescein disodium salt; Fluorescein sodium B.P; Fluorescein, disodium salt; Fluorescein, soluble; Fluorescite; Flurenate; Ful-Glo; Funduscein; Funduscein-25; Furanium; Hidacid Uranine; Japan Yellow 202(1); Obiturine; Resorcinol phthalein sodium; Sodium fluorescein; Sodium fluoresceinate; Sodium salt of hydroxy-o-carboxy-phenyl-fluorone; Soluble Fluoresceine BPS; Soluble Fluorescein; Soluble Fluoresceine; Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 3',6'-dihydroxy-, disodium salt; Uranin; Uranin A; Uranin S; Uranine; Uranine A; Uranine A Extra; Uranine O; Uranine SS; Uranine WSS; Uranine Yellow; [ChemIDplus]

Category

Other Dyes

Description

Orange-red hygroscopic solid; [Merck Index] Dark red powder; [Sigma-Aldrich MSDS]

Sources/Uses

Used in analysis of subterranean waters, as a reagent (protein label, immunohistological stain, and immunofluorescent label), diagnostic aid (corneal abrasions), and for ophthalmic angiography and contact lens fitting; [Merck Index] Used as a marker for sea rescues, for dyeing silk and wool, to make fluorescent laminates, and in commercial antifreezes; [HSDB] Permitted for use as an inert ingredient in non-food pesticide products; [EPA]

Comments

Causes changes in motor activity, ataxia, and dyspnea in oral lethal-dose studies of mice and rats; [RTECS] A skin, eye, and respiratory tract irritant; [HSDB] May cause irritation; Targets the kidney; [Sigma-Aldrich MSDS] See " Fluorescein."

Exposure Assessment
Vapor Pressure

1.6E-17 mm Hg

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