Pharmaceutical Materials

CAS Number: 26576-46-5

Molecular Formula: C11H11N3O3

Molecular Weight: 233.22 g/mol

Appearance: White to off-white powder or crystalline solid

Melting Point: 350°C

Usage: Mainly used in the dye (pigment) industry as a coupling component for synthesizing various pigments.

 

Aspect	Details
Name	5-Acetoacetamidobenzimidazolone
Common Synonyms	5-(Acetoacetamido)benzimidazolone; N-(1H-Benzimidazol-5-yl)-3-oxobutanamide
CAS No.	26576-46-5
Molecular Formula	C₁₁H₁₁N₃O₃
Molecular Weight	233.23 g/mol
Physical Properties	Appearance: Yellow to orange crystalline powder Solubility: Soluble in organic solvents like DMF, DMSO, and hot ethanol; slightly soluble in water Melting Point: Typically reported between 260-280 °C (decomposition observed)
Chemical Properties	Features a benzimidazolone core substituted with an acetoacetamide group (-NHCOCH₂COCH₃) at the 5-position. The acetoacetamide moiety enables keto-enol tautomerism, enhancing its reactivity in nucleophilic addition and condensation reactions. The benzimidazolone ring contributes stability and color-forming potential.
Applications	Used as a yellow to orange pigment intermediate in the synthesis of organic dyes and colorants Employed in the formulation of inks, paints, and plastics for vibrant coloration
Safety Information	Handle with appropriate PPE to avoid skin and eye contact Store in a cool, dry environment, away from strong acids and bases

Disclaimer: The above content is for reference and communication only among industry insiders, and does not guarantee its accuracy or completeness. According to relevant laws and regulations and the regulations of this website, units or individuals who purchase related items should obtain valid qualifications and qualification conditions.

If you're ready to take the next step, Leave your message below and we’ll reply soon. 20+ years of chemical manufacturing & export experience, a partner you can trust.