135861-56-2

Basic information

• Product Name: 1,3:2,4-Bis(3,4-dimethylobenzylideno) sorbitol
• Synonyms: 1,3:24-BIS (3,4-DIMETHYLOBENZYLIDENO) SORBITOL;DMDBS;Nucleating Agent 3988;Bis(3,4-dimethylbenzylidene)sorbitol;DIMETHYLDIBENZYLIDENE SORBITOL;1,3:24- BIS (3,4-DIMETHYLOBENZYLIDENO)SORBITOL (DMDBS);Di-(3,4-dimethylbenzylidene)sorbitol;D-Glucitol, 1,3:2,4-bis-O-(3,4-dimethylphenyl)methylene-
• CAS NO: 135861-56-2
• Molecular Formula: C₂₄H₃₀O₆
• Molecular Weight: 414.4914
• Mol File: 135861-56-2.mol
• Article Data: 7

Chemical Properties

• Melting Point: 275°C(lit.)
• Boiling Point: 611.599 °C at 760 mmHg
• Flash Point: 323.684 °C
• Appearance: white powder
• Density: 1.195
• Vapor Pressure: 0-0Pa at 25℃
• Storage Temp.: Sealed in dry,Room Temperature
• Solubility: DMSO (Slightly), Pyridine (Sparingly, Sonicated)
• PKA: 13.26±0.20(Predicted)
• Water Solubility: 40-47600ng/L at 20℃
• CAS DataBase Reference: 1,3:2,4-Bis(3,4-dimethylobenzylideno) sorbitol(CAS DataBase Reference)
• NIST Chemistry Reference: 1,3:2,4-Bis(3,4-dimethylobenzylideno) sorbitol(135861-56-2)
• EPA Substance Registry System: 1,3:2,4-Bis(3,4-dimethylobenzylideno) sorbitol(135861-56-2)

Safety Data

• Hazardous Substances Data: 135861-56-2(Hazardous Substances Data)

Usage

Appearance

1,3:2,4-Bis(3,4-dimethylobenzylideno) sorbitol is a white to off-white solid.

Uses

1,3:2,4-Bis(3,4-dimethylobenzylideno) sorbitol is a useful research chemical.

Flammability and Explosibility

Nonflammable

Synthetic route

3,4-dimethylbenzaldehyde (5973-71-7) + D-sorbitol (50-70-4) → 1,3:2,4-di-O-(3,4-dimethylbenzylidene)-D-sorbitol (135861-56-2)

Conditions	Yield
toluene-4-sulfonic acid In acetonitrile at 20℃; for 12h; Product distribution / selectivity;	99%
With trimethyl orthoformate; bismuth(lll) trifluoromethanesulfonate In methanol at 20℃; for 48h; Product distribution / selectivity;	99%
With trimethyl orthoformate; bismuth(lll) trifluoromethanesulfonate In methanol at 20℃; for 49h; Product distribution / selectivity; Heating / reflux;	99%

Upstream product

• 5973-71-7 3,4-dimethylbenzaldehyde 
• 50-70-4 D-sorbitol 

Relevant articles and documents

Method of preparing powdery diacetal clarifying agent

Provided is a method of preparing a powdery diacetal clarifying agent, which comprises mixing an aromatic aldehyde, a polyol, and an acid catalyst in an organic polar solvent, adding a hydrogenating agent and an inorganic silicon-containing agent into the foregoing mixture, and filtering the mixture. The powdery diacetal clarifying agent prepared by the method can have excellent flowability, dispersability, thermal resistance, and color stability. Accordingly, the powdery diacetal clarifying agent does not release stinking odor and incur yellowing at high temperature, allowing the plastic articles to have improved appearance and visual appeal.

Process For Preparation Of Acetals

A process for the preparation of 1,3:2,4-bis (4-methylbenzylidene) sorbitol (MDBS) and 1,3:2,4-bis (3,4-dimethylbenzylidene) sorbitol (DMDBS) via a dehydrocondensation reaction is disclosed. The reaction is carried out between an aldehyde and an alditol in a mole ratio of 2:1 wherein ionic fluid is used as the acidic catalyst and/or reaction medium. The ionic fluid used in accordance with the present invention is quaternary ammonium salt based ionic liquid.

PROCESS FOR PREPARATION OF ACETALS

A process for the preparation of 1,3:2,4-bis(4-methylbenzylidene) sorbitol (MDBS) and 1,3:2,4-bis(3,4-dimethylbenzylidene) sorbitol (DMDBS) via a dehydrocondensation reaction is disclosed. The reaction is carried out between an aldehyde and an alditol in a mole ratio of 2:1 wherein ionic liquid is used as the acidic catalyst and/or reaction medium. The ionic liquid used in the process is quaternary ammonium salt based ionic liquid.