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SODIUM SALT
AKA “Fluorescein disodium salt, Soluble fluorescein, Sodium fluorescein, Uranin, Uranine WSS, Resorcinol phthalein sodium, Uranine Yellow, Ak-Fluor, Funduscein-25, Fluorescein, soluble”
Ingredient
Ingredient Facts
Sodium salt
AKA: Fluorescein disodium salt, Soluble fluorescein, Sodium fluorescein, Uranin, Uranine WSS, Resorcinol phthalein sodium, Uranine Yellow, Ak-Fluor, Funduscein-25, Fluorescein, Soluble
Ingredient · Hair Dyeing · EWG: 1
Synthetic
Clean
Disodium 2-(3-oxo-6-oxidoxanthen-9-yl)benzoate (CI 45350)
Solubility greater than or equal to 100 mg/mL at 68 °F (NTP, 1992)
Mol. Weight
376.30
CAS #
518-47-8
State
Fluorescein, disodium salt is an orange-red to dark red powder. Water-soluble form of fluorescein. Odorless and almost tasteless. pH (5% solution) 7.8. May be sensitive to prolonged exposure to light
See origin →
Functions
Hair Dyeing
EWG
1
CIR
—
Pregnancy
—
Regulatory Status
EU✔ permitted
JAPAN✔ permitted
CANADA✔ permitted
Regulatory Agencies
Effects of Sodium Salts of Fatty Acids and Their Derivatives on Skin Permeation of Cromolyn Sodium.
Akinbote OE, Verana G, Dandekar AA, Tijani AO, Mishra D et al.
AAPS PharmSciTech, 2023
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Effects of Sodium Salts of Fatty Acids and Their Derivatives on Skin Permeation of Cromolyn Sodium.
Akinbote OE, Verana G, Dandekar AA, Tijani AO, Mishra D et al.
AAPS PharmSciTech, 2023
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Soluble Collagen
European Commission
EU Cosmetic Ingredient Database (CosIng)
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Soluble Elastin
European Commission
EU Cosmetic Ingredient Database (CosIng)
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SODIUM SALT
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
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Soluble Collagen
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Soluble Elastin
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
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In Vitro Anti-Malassezia Activity of Castanea crenata Shell and Oil-Soluble Glycyrrhiza Extracts.
Han SH, Hur MS, Kim MJ, Jung WH, Park M et al.
Annals of dermatology, 2017
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Investigation of water-soluble elastin as a multifunctional cosmetic material: Moisturizing and whitening effects.
Inoue A, Hikima T, Taniguchi S, Nose T, Maeda I
Journal of cosmetic science, 2017
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[Metabolism of 14C-soluble proteins from silkworm tissues during silk formation].
Klunova SM, Altsybeeva TI, Filippovich IuB
Biokhimiia (Moscow, Russia), 1980
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An Aliphatic Ester Diisopropyl Sebacate Exhibited an Adjuvant Effect on Fluorescein Isothiocyanate-Induced Contact Hypersensitivity Mouse Models.
Kurohane K, Kimura A, Terasawa R, Kobayashi K, Suzuki W et al.
Biological & pharmaceutical bulletin, 2018
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In vitro skin permeation and anti-atopic efficacy of lipid nanocarriers containing water soluble extracts of Houttuynia cordata.
Kwon TK, Kim JC
Drug development and industrial pharmacy, 2014
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Optimizing interactions between soluble silk fibroin and capryl glucoside for design of a natural and high-performance co-surfactant system.
Maxwell R, Costache MC, Giarrosso A, Bosques C, Amin S
International journal of cosmetic science, 2021
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The extraction, structure characterization and hydrogel construction of a water-insoluble β-glucan from Poria cocos.
Meng Y, Hu C, Cheng J, Qiu W, Wang Q et al.
Carbohydrate research, 2023
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Verified Jun 2026
Data: PubChem · CosIng · EWG