Dimethyl Sulfoxide CAS 67-68-5

Name: Dimethyl Sulfoxide CAS 67-68-5
Brand: Aure Chemical
Price: 1.00 USD
Availability: InStock
Rating: 5.0 (1 reviews)

Synonyms: DMSO; Methyl sulfoxide; Methylsulfinylmethane; Dimethyl sulphoxide; Dimexide; Sclerosol; (CH3)2SO; Sulfinylbismethane; Methylsulfoxide

Aure Chemical is a reliable supplier of Dimethyl Sulfoxide in China, delivering consistent quality, stable supply, and professional service to customers worldwide. With extensive experience in chemical sourcing and international distribution, we support customers with flexible supply solutions and comprehensive documentation.

We can provide customized requirements in terms of product purity, packaging specifications, and other aspects.

Please contact us to obtain the latest product information.

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Product Details

Dimethyl Sulfoxide (DMSO, CAS 67-68-5): Product Information and Quality Data

Aure Chemical supplies dimethyl sulfoxide (DMSO, CAS 67-68-5), a high-boiling, polar aprotic organosulfur solvent with the molecular formula C ₂ H ₆ OS. DMSO is miscible with water and dissolves a broad range of substances, making it useful in organic synthesis, industrial formulation, polymer processing and laboratory applications. Read more about its properties and industrial applications . Product suitability depends on the intended use, required grade and applicable quality standards; technical specifications and supporting documentation should be confirmed before ordering.

Basic Information of Dimethyl Sulfoxide

The following identifiers and physical properties describe dimethyl sulfoxide. The dated inspection results in the next section are reported separately from general reference properties.

CAS No.:	67-68-5
EC No.:	200-664-3
Linear Formula:	C₂H₆OS
Molecular Weight:	78.13 g/mol
Appearance:	Clear, colorless liquid at temperatures above its freezing point; crystals may form when cooled.
Odor:	Essentially odorless; a faint garlic-like or sulfurous odor may be perceptible.
Melting Point:	Approximately 18.5 °C
Boiling point:	Approximately 189 °C at atmospheric pressure
Density:	Approximately 1.10 g/cm³ at 20 °C
Solubility:	Miscible with water and many organic solvents.
Hygroscopic:	Absorbs moisture from ambient air; keep containers tightly sealed.
Handling Considerations:	DMSO can enhance the skin absorption of dissolved substances; consult the current SDS and use suitable personal protective equipment.
Chemical Structure:

A supplier inspection report dated 7 August 2026 provides the reference quality data below. These values describe the tested sample and should not be interpreted as guaranteed specifications for every available grade or future shipment.

Reference Quality Analysis of Dimethyl Sulfoxide

The following inspection data was provided by a manufacturing source for a DMSO sample tested on 7 August 2026 . The original report does not identify a production batch number. Specifications and results are reproduced from that report for preliminary technical evaluation.

Physical and Chemical Quality Parameters

Test Item	Reported Specification	Reference Result
DMSO assay (wt. %)	≥ 99.98%	99.99113%
Water content (wt. %)	≤ 0.03%	0.0258%
Acid value (as KOH)	≤ 0.01 mg/g	0.0014 mg/g
Crystallization point	≥ 18.30 °C	18.44 °C
Light transmittance at 400 nm	≥ 98.0%	99.90%
Refractive index at 20 °C	1.4778–1.4790	1.4787
Color (Hazen)	≤ 10	7
Density at 25 °C	1.0930–1.1030 g/cm³	1.096 g/cm³
Appearance	Colorless, transparent liquid or crystals; free from visible foreign matter	Colorless, transparent liquid; no visible foreign matter

Trace Metal Results

The following trace elements were measured in the same inspection sample. The specification limit recorded for each element was ≤ 50 µg/kg.

Element	Reported Specification (µg/kg)	Reference Result (µg/kg)
Sodium (Na)	≤ 50	3.13
Magnesium (Mg)	≤ 50	0.04
Aluminum (Al)	≤ 50	0.02
Potassium (K)	≤ 50	0.01
Calcium (Ca)	≤ 50	0.35
Chromium (Cr)	≤ 50	3.12
Manganese (Mn)	≤ 50	0.07
Iron (Fe)	≤ 50	10.68
Nickel (Ni)	≤ 50	2.79
Copper (Cu)	≤ 50	0.11
Zinc (Zn)	≤ 50	4.44
Lead (Pb)	≤ 50	0.46

Quality Considerations

The reference sample showed high DMSO assay, low measured water content and low acid value, as well as individual trace-metal results within the reported limits. Moisture content is relevant when evaluating DMSO for water-sensitive processes; metal impurity limits may be important where solvent cleanliness is critical. However, these results alone do not establish pharmaceutical, electronic or any other application-specific grade certification.

Quality documentation: These are historical results from one supplier inspection, not a current lot-specific COA or a universal supply guarantee. Available grades, current specifications, test methods and the latest COA or SDS should be confirmed with Aure Chemical before purchase. Additional qualification may be required for regulated or highly sensitive applications.

Typical Applications of Dimethyl Sulfoxide (DMSO)

DMSO is used as a process solvent or formulation component in several industries. Selection of a suitable grade must take into account purity, impurities, safety requirements and the relevant end-use regulations.

DMSO can be used as a solvent in pharmaceutical research and formulation development ; use in regulated drug products requires grade-specific qualification and compliance with applicable requirements.
It is used as an industrial solvent in polymer and resin processing, extraction and chemical manufacturing.
Appropriately qualified high-purity material may be used in electronics cleaning and specialized process formulations, subject to the customer's contamination limits and process validation.
In organic synthesis, DMSO is used as a polar aprotic reaction solvent in many substitution and other synthetic reactions.
DMSO is also used as an extraction and processing solvent in selected separation and purification operations.
In cell biology, appropriate grades of DMSO are used in cryopreservation formulations , where formulation protocols and biological-use specifications require additional evaluation.

DMSO Sourcing and Technical Coordination from Aure Chemical

Aure Chemical supports international buyers by coordinating qualified manufacturing sources, confirming available specifications and arranging chemical export documentation and shipping solutions according to individual orders.

Documented Reference Data: We can share available manufacturer quality information for initial screening and coordinate a current lot-specific COA when applicable.
Specification Matching: We review requested purity, moisture, impurity and packaging requirements with manufacturing sources before final quotation.
Export Coordination: We help arrange appropriate packaging, shipment documentation and logistics in line with product classification and destination requirements.
Clear Technical Communication: We can relay specific quality questions to manufacturers and clarify which tests or documentation are available for the offered material.

For a current DMSO quotation, please share your required grade, quality limits, quantity, packaging and destination. We will check the available supply options and supporting documentation.

Frequently Asked Questions — Dimethyl Sulfoxide (CAS 67-68-5)

What is Dimethyl Sulfoxide (DMSO)?

Dimethyl sulfoxide (DMSO; CAS 67-68-5) is an organosulfur compound with the formula (CH ₃ ) ₂ SO. It is a polar aprotic solvent with a relatively high boiling point and is miscible with water.

Is Dimethyl Sulfoxide safe?

DMSO should be handled with appropriate care even where an SDS does not classify it as hazardous under a given GHS-based system. It can enhance the skin absorption of dissolved contaminants and is combustible when sufficiently heated. Use appropriate gloves, protective eyewear and ventilation, and consult the latest SDS for the actual supplied grade and destination market.

What is Dimethyl Sulfoxide used for?

DMSO is widely used in chemical synthesis, industrial solvent systems, polymer processing and research. Suitably qualified grades are also used in pharmaceutical development, electronics processes and cell cryopreservation. The supplied grade must be assessed for each application.

How should DMSO be stored?

Keep DMSO in properly compatible, tightly closed containers in a cool, dry, well-ventilated area, away from strong oxidizers and ignition sources. Because its freezing point is around 18.5 °C, crystals may form at cooler room temperatures; refer to supplier handling instructions if remelting is needed.

What is the shelf life of DMSO?

Shelf life and any retest date depend on the manufacturer, product grade, packaging and storage conditions. Request the current product specification, label or technical data sheet for the applicable shelf-life or retest information; a COA alone may not state it.

Does Aure Chemical provide different grades of DMSO?

Aure Chemical can check the availability of different DMSO purity levels and source-specific specifications. Pharmaceutical, electronics and other application-specific requirements must be reviewed individually; a high assay value alone does not confirm suitability or certification for those uses.

Where can I find the Safety Data Sheet (SDS) for DMSO?

Please contact Aure Chemical for the SDS applicable to the proposed source and grade. A representative SDS may also be linked from this product page. For an order, confirm that the SDS and transport information match the actual shipment.

Safety, Handling and Transport Information

DMSO requires appropriate handling precautions even when a particular safety data sheet does not assign a CLP hazard pictogram. The classification and labeling requirements depend on jurisdiction and the SDS for the material being supplied.

EU CLP classification: A currently available DMSO SDS used for this product lists the substance as not classified under EU CLP. This should be verified against the applicable, up-to-date supplier SDS.
Combustibility: DMSO has a flash point of approximately 87 °C (closed cup); keep away from excessive heat and ignition sources. Certain U.S. SDS documents identify it as a combustible liquid (Category 4, H227).
Skin exposure: DMSO can facilitate dermal absorption of dissolved chemicals. Use appropriate protective gloves and eyewear, and prevent contact with contaminated surfaces or solutions.
Sea and air transport: Pure DMSO is generally listed as not regulated as dangerous goods under IMDG and IATA in available SDS documentation. Confirm the correct classification, packaging and shipment conditions for each consignment.
UN number / transport class / packing group: Not assigned where the shipment is classified as non-dangerous goods.

Important: The information above is a summary for preliminary reference and does not replace the current SDS or a transport compliance review.