Description

Urocanic Acid CAS NO 104-98-3 is an endogenous, UV-absorbing imidazole derivative naturally found in the skin. This compound is of significant commercial and research interest due to its dual role as a natural sunscreen agent and a key immunomodulator in the skin's response to ultraviolet radiation. It serves as a critical intermediate and active ingredient for manufacturers in the cosmetic, pharmaceutical, and life science research sectors, where its unique photochemical and biological properties are harnessed.

Application

• Cosmetic & Sunscreen Formulations: As a natural, endogenous UV filter that absorbs UVB radiation, contributing to photoprotection in advanced skincare products.
• Immunology & Dermatology Research: A vital research chemical for studying the skin's immune response, photoimmunosuppression, and conditions like polymorphous light eruption.
• Pharmaceutical Intermediates: Used in the synthesis of more complex molecules targeting inflammatory and immune-mediated skin disorders.
• Biochemical Studies: Employed as a substrate or standard in enzymatic studies related to histidine metabolism.
• Reference Standards: Serves as a high-purity analytical standard for quality control in cosmetic and pharmaceutical manufacturing.

Basic Information

Product Name	Urocanic Acid
CAS No.	104-98-3
Molecular Formula	C6H6N2O2
Molecular Weight	138.12 g/mol
Synonyms	(E)-3-(1H-Imidazol-4-yl)acrylic acid; trans-Urocanic Acid; 4-Imidazoleacrylic acid; Imidazole-4-acrylic acid; β-(4-Imidazolyl)acrylic acid; UCA; 3-(1H-Imidazol-4-yl)-2-propenoic acid
EINECS	203-257-4

Quality Control

Our Urocanic Acid is produced and tested under a rigorous quality management system to ensure batch-to-batch consistency and high purity. We offer grades suitable for research, cosmetic, and pharmaceutical applications, with specifications tailored to meet industry requirements. Comprehensive testing, including identity, purity, and impurity profiling, is performed. A Certificate of Analysis (COA) is provided with each shipment to guarantee compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). Keep away from incompatible materials. For long-term storage, consider inert gas purging to minimize potential oxidative degradation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm
Isomer Ratio (trans/cis)	Contact for details

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.