Description

2,4-o-(3,4-Dimethylbenzylidene)-D-Sorbitol is a specialized sorbitol derivative primarily used as a high-performance clarifying and nucleating agent in polymer processing. This compound matters for manufacturers seeking to enhance the optical clarity, mechanical properties, and crystallization rate of polyolefin plastics. It is a critical additive for producers in the packaging, automotive, and consumer goods industries who require improved product transparency and processing efficiency.

Application

• Polypropylene (PP) Clarification: Acts as a highly effective nucleating agent to improve the transparency and reduce haze in clarified PP used for food containers, housewares, and medical packaging.
• Polyethylene (PE) Modification: Enhances the crystallization behavior and optical properties of polyethylene films and molded articles.
• Polymer Processing Aid: Improves cycle times and dimensional stability in injection molding and extrusion processes by promoting faster polymer solidification.
• Specialty Additive Synthesis: Serves as a key intermediate or building block in the synthesis of more complex polymer additives and fine chemicals.
• Masterbatch Production: Used in the formulation of high-concentration additive masterbatches for consistent and efficient dispersion in polymer matrices.

Basic Information

Product Name	2,4-o-(3,4-Dimethylbenzylidene)-D-Sorbitol
CAS No.	208462-99-1
Molecular Formula	C15H20O6
Molecular Weight	296.32 g/mol
Synonyms	1,3:2,4-Bis(3,4-dimethylbenzylidene)sorbitol; DMDBS; 3,4-Dimethyl-DBS; Nucleating Agent DMDBS; 1,3:2,4-Bis-O-[(3,4-dimethylphenyl)methylene]-D-glucitol; Bis(3,4-dimethylbenzylidene)sorbitol; Millad® 3988 (trade name equivalent); Clarifying Agent for Polypropylene
EINECS	Contact for details

Quality Control

Our 2,4-o-(3,4-Dimethylbenzylidene)-D-Sorbitol is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets the high-purity standards required for polymer applications. Key parameters such as assay, melting point, and specific optical rotation are verified. Certificates of Analysis (COA) documenting full specifications are available for every shipment to support your quality assurance protocols.

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 material 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 structure
Assay (HPLC)	≥ 98.5%
Melting Point	245 - 255 °C
Specific Optical Rotation	+39.0° to +43.0° (c=1 in DMF)
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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