Active Pharmaceutical Ingredient (API)

  1. Location
  2. Home
  3. News
  4. Active Pharmaceutical Ingredient (API)

DMCBDA (Dimethylcyclobutane Tetracarboxylic Dianhydride) - CAS: 137820-87-2, 98% Purity, Kilogram-Scale Supply

2026-07-21 13:48:54
Product Overview

Dimethylcyclobutane tetracarboxylic dianhydride (commonly abbreviated as DMCBDA, CAS: 137820-87-2) is a highly sophisticated modified alicyclic dianhydride monomer at the forefront of flexible optoelectronics research. It serves as a vital structural modifier in the synthesis of high-performance Colorless Polyimide (CPI) films, next-generation LCD/OLED liquid crystal alignment layers, and low-dielectric (Low-k) insulation matrices engineered for high-frequency/high-speed copper-clad laminates (5G/6G CCL).

DMCBDA (Dimethylcyclobutane Tetracarboxylic Dianhydride) | CAS: 137820-87-2, 98% Purity, Kilogram-Scale Supply

Compared to conventional unsubstituted cyclobutane dianhydrides (CBDA), DMCBDA incorporates two methyl groups onto the cyclobutane core to intentionally disrupt molecular chain regularity. This modification significantly enhances the solubility of the resulting polyimide in organic solvents (drastically simplifying downstream coating and curing processes) while fully preserving the excellent alicyclic benefits: exceptional optical transmittance, near-zero Yellowness Index (Y.I.), reliable thermal stability, and low dielectric constants. Utilizing our mature directional synthesis and advanced purification systems, we provide 98% purity ready stock on a stable kilogram-scale (kg-scale) to secure your industrial supply pipeline.
Core Advantages

  • High Polymerization Purity (≥ 98.0%): Refined via advanced directional synthesis and multi-stage vacuum recrystallization. Free carboxylic acids, positional isomers, and process impurities are strictly restricted to ensure consistent molecular weight growth and defect-free film formation during polymer synthesis.

  • Superior Solubility Profile: Thanks to the steric hindrance of the dual methyl groups, the resulting polyamic acid (PAA) precursors or fully cured soluble PI resins exhibit excellent solubility in common polar solvents (such as NMP, DMAc, GBL, etc.). This allows downstream clients to reduce processing temperatures and formulation costs.

  • Stable Kilogram-Scale Capacity: Supported by a standardized pilot-scale manufacturing facility. We bypass the single-gram constraints of traditional catalog reagent retailers, providing a continuous, reliable supply from kilograms to hundreds of kilograms.

  • Moisture-Barrier Zero-Degradation Packaging: Because cyclic acid anhydrides are highly hygroscopic and readily hydrolyze upon exposure to moisture, all products are packaged within ultra-dry, high-purity nitrogen-flushed gloveboxes using vacuum-sealed, multi-layer high-barrier aluminum foil bags.

Technical Specifications

  • Chemical Name: Dimethylcyclobutane tetracarboxylic dianhydride / 1,3-Dimethylcyclobutane-1,2,3,4-tetracarboxylic dianhydride / DMCBDA

  • CAS Registry Number: 137820-87-2

  • Molecular Formula: C₁₀H₈O₆

  • Molecular Weight: 224.17

  • Appearance: White to off-white crystalline powder.

  • Assay / Purity: ≥ 98.0% (HPLC)

  • Standard Packaging: 250g/bag, 500g/light-proof bag, 1kg/aluminum foil bag (Customized multi-layer vacuum packaging available upon request).

Disclaimer
All chemical products sold by our company are intended solely for laboratory research, export, polymer process engineering, or industrial manufacturing R&D. They are not intended for use as food additives, cosmetic raw materials, or clinical drugs in humans.


为您推荐