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Description

Terephthalylidene dicamphor sulfonie acid · CAS 90457-82-2 · C28H34O8S2. UNII M94R1PM439. Melting Point: 255 °C (decomposes).

Identification

CAS Registry Number	90457-82-2
PubChem CID	146382
Molecular formula	C28H34O8S2
IUPAC name	[3-[[4-[[7,7-dimethyl-3-oxo-4-(sulfomethyl)-2-bicyclo[2.2.1]heptanylidene]methyl]phenyl]methylidene]-7,7-dimethyl-2-oxo-1-bicyclo[2.2.1]heptanyl]methanesulfonic acid
UNII (FDA)	M94R1PM439

Computed Descriptors

Molecular Weight	562.7
XLogP3	3.1
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	8
Rotatable Bond Count	6
Exact Mass	562.16951039
Monoisotopic Mass	562.16951039
Topological Polar Surface Area	160
Heavy Atom Count	38
Formal Charge	0

Physical & Chemical Properties

Melting Point	255 °C (decomposes)

Physical description & handling notes

• Solid
• Stable under recommended storage conditions.
• pKa = 1.99 /sulfuric acid moiety/
• When exposed to UV ecamsule undergoes reversible photoisomerization followed by photoexcitation. The absorbed UV is then released as thermal energy, without penetrating the skin, thereby protecting the skin from UV exposure.

Regulatory Status

Regulatory & Food Contact	CIR / INCI: Uv filter; Uv absorber

GHS Hazard Classification

Reported hazard statements	H318

Documented Uses

• Broad spectrum UVA absorber with some UVB absorption.
• Cosmetics -> Uv filter; Uv absorber
• Preparation: G. Lang et al., German patent 3321679; eidem, United States of America patent 4585597 (1983, 1986 both to L'Oreal).
• When used in OTC sunscreen drug products in the United States, this ingredient must be called ecamsule. For cosmetics and personal care products in the United States, terephthalylidene dicamphor sulfonic acid may be used as an ultraviolet light absorber. In this case, the ingredient protects the product from deterioration by absorbing UV light. When used to protect the product, this ingredient is called terephthalylidene dicamphor sulfonic acid.
• Applied topically to filter out UVA rays.
• For more Therapeutic Uses (Complete) data for Terephthalylidene dicamphor sulfonic acid (6 total), please visit the HSDB record page.

Synonyms

Ecamsule; Terephthalylidene dicamphor sulfonic acid; 92761-26-7; Ecamsul; Mexoryl; Mexoryl SX; DTXSID80869056; M94R1PM439; Ecamsulum; NSC-760054; RefChem:590537; DTXCID50817089; (E-E)-3,3'-(1,4-Phenylenedimethylidene)bis(2-oxobornane-10-sulfonic acid); 410-960-6; 922-216-2; 90457-82-2

Frequently Asked Questions

What are the CAS number and molecular formula of Terephthalylidene dicamphor sulfonie acid?

CAS 90457-82-2; molecular formula C28H34O8S2; molecular weight — g/mol.

What other names is Terephthalylidene dicamphor sulfonie acid known by?

Ecamsule, Terephthalylidene dicamphor sulfonic acid, 92761-26-7, Ecamsul, Mexoryl, Mexoryl SX.

What is the regulatory status of Terephthalylidene dicamphor sulfonie acid?

Documented regulatory listings: CIR / INCI: Uv filter; Uv absorber.

Is Terephthalylidene dicamphor sulfonie acid classified as hazardous?

Hazard statements reported: H318.

What are the key physical properties of Terephthalylidene dicamphor sulfonie acid?

Melting Point: 255 °C (decomposes).

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.