Description

Di-p-Methylbenzylidenesorbitol (CAS NO 81541-12-0) is a high-purity sorbitol derivative widely recognized as a highly effective clarifying and nucleating agent for polyolefin polymers. This compound is critical for manufacturers seeking to enhance the optical properties and processing characteristics of their plastic products. It is primarily utilized by the plastics and polymer industries to improve the clarity, stiffness, and cycle times of polypropylene and other thermoplastic materials.

Application

• Primary nucleating agent for polypropylene (PP) homopolymers and random copolymers to increase crystallization temperature and rate.
• Clarifying agent for food packaging, household containers, and medical devices to achieve superior optical transparency.
• Enhances stiffness and heat distortion temperature (HDT) of molded and extruded polyolefin articles.
• Improves processing efficiency by reducing cycle times in injection molding operations.
• Used in the production of biaxially oriented polypropylene (BOPP) films for high-clarity packaging.
• Applicable in masterbatch formulations for consistent dispersion in polymer matrices.

Basic Information

Product Name	Di-p-Methylbenzylidenesorbitol
CAS No.	81541-12-0
Molecular Formula	C22H26O6
Molecular Weight	386.44 g/mol
Synonyms	1,3:2,4-Bis-O-[(4-methylphenyl)methylene]-D-glucitol; DMDBS; Di(p-methylbenzylidene)sorbitol; Millad® 3988; 1,3:2,4-Bis(4-methylbenzylidene)sorbitol; Nucleating Agent 3988; Clarifying Agent for PP; Bis(4-methylbenzylidene)sorbitol
EINECS	Contact for details

Quality Control

Our Di-p-Methylbenzylidenesorbitol is manufactured under a stringent quality management system to ensure batch-to-batch consistency and high performance. Each lot is tested against rigorous internal specifications for purity, melting point, and performance in polymer applications. A Certificate of Analysis (COA) documenting key parameters is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.5%
Melting Point	245 - 255 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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