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Since its establishment in 2010, Sinolook has been deeply involved in the energy and chemical sectors and has become one of the leading base oil and petrochemical traders in China and Asia. In the niche field of fine chemicals, we have a deep understanding of the characteristics and application scenarios of each type of product.
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![Maleic Anhydride]()
Maleic AnhydrideMaleic anhydride (MA / MAH, CAS 108-31-6) is a white crystalline solid — formula C₄H₂O₃, melting point 52.5–54.5°C — with a reactive cyclic anhydride structure that enables addition, Diels-Alder, -
![2-Methyl-2,4-pentanediol]()
2-Methyl-2,4-pentanediol2-Methyl-2,4-pentanediol (MPD / Hexylene Glycol, CAS 107-41-5) is a colorless, low-odor branched diol with the condensed formula (CH₃)₂C(OH)–CH₂–CH(OH)–CH₃, fully miscible with water and most organic -
![1-Methyl-2-pyrrolidinone]()
1-Methyl-2-pyrrolidinoneNMP (N-Methyl-2-pyrrolidinone / 1-methyl-2-pyrrolidone, CAS 872-50-4) is a colorless, high-boiling (bp 202°C) polar aprotic solvent with the molecular formula C₅H₉NO. Its five-membered lactam -
![1-Ethyl-2-pyrrolidinone]()
1-Ethyl-2-pyrrolidinone1,2-Diaminocyclohexane (DACH, CAS 1121-22-8) is a colorless liquid cycloaliphatic diamine with the formula C₆H₁₄N₂, available as trans-racemic, (1R,2R)-, and (1S,2S)-enantiopure grades. The chiral -
![Pyrrolidine (CAS 123-75-1) — High-Purity ≥99% Industrial, Reagent & Cosmetic Grade]()
Pyrrolidine (CAS 123-75-1) — High-Purity ≥99% Industrial,...Pyrrolidine is a colorless, hygroscopic cyclic secondary amine with a characteristic ammonia-like odor and excellent chemical reactivity. As a professional trade export company, we are committed to -
![2-Methyltetrahydrofuran (2-MeTHF) | CAS 96-47-9 | China Manufacturer & Supplier]()
2-Methyltetrahydrofuran (2-MeTHF) | CAS 96-47-9 | China M...2-Methyltetrahydrofuran (2-MeTHF, CAS 96-47-9) is a colorless, low-toxicity bio-based cyclic ether used as a green replacement for THF, dichloromethane, and toluene in pharmaceutical synthesis, -
![Dimethyl Sulfoxide (DMSO, CAS 67-68-5) — China Manufacturer & Supplier | Industrial, Pharmaceutical & Electronic Grade for Bulk Purchase]()
Dimethyl Sulfoxide (DMSO, CAS 67-68-5) — China Manufactur...Dimethyl Sulfoxide (DMSO, CAS 67-68-5) is a colorless, high-purity polar aprotic solvent — the universal solvent — miscible with water and able to dissolve most organic compounds, salts, and
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What is Maleic Anhydride
Maleic anhydride (C 4 H 2 O 3) is a highly reactive organic compound and the acid anhydride of maleic acid. It appears as a colorless or white solid with a pungent, acrid odor. Primarily manufactured by the catalytic oxidation of butane, it is a versatile chemical intermediate used to produce plastics, coatings, and agrochemicals.
What is Dimethyl Sulfoxide?
Dimethyl sulfoxide (DMSO) is an organosulfur compound with the molecular formula (CH3)2SO. As a colorless, odorless liquid, it is acclaimed for its solvent capabilities and low toxicity. It’s classified as a polar aprotic solvent, making it suitable for a variety of chemical reactions and applications.
Specification
|
Specification Item |
Standard Grade Industry / Polymer |
Limit |
|
Appearance |
White flaky or granular crystals, free of visible impurities and discoloration |
|
|
Purity (Content) |
≥ 99.5% |
Core quality indicator |
|
Melting Point |
52.5–54.5 °C |
Process compatibility indicator |
|
Free Acid Content |
≤ 0.2% |
Affects reactivity & catalyst sensitivity |
|
Color (Pt-Co) |
≤ 20 |
Purity & appearance indicator |
|
Flash Point |
103 °C |
Safe solid/molten handling |
|
Storage Stability |
6 months |
Sealed, cool, dry warehouse (0–25°C) |
|
Packaging Options |
25 kg moisture-proof bag | 500 kg jumbo bag | 1000 kg IBC bag | Molten tanker truck (bulk) |
|
|
Specification Item |
Industrial Grade |
Pharmaceutical Grade |
Electronic Grade |
|
Appearance |
Colorless transparent viscous liquid |
Colorless transparent viscous liquid |
Ultra-pure colorless transparent liquid |
|
Content (Purity) |
≥99.0% |
≥99.9% |
≥99.99% |
|
Water Content |
≤0.2% |
≤0.05% |
≤0.01% |
|
Color (Pt-Co) |
≤20 |
≤10 |
≤5 |
|
Melting Point |
18.45°C |
18.45°C |
18.45°C |
|
Boiling Point |
189°C |
189°C |
189°C |
|
Flash Point (Closed Cup) |
95°C |
95°C |
95°C |
|
Metal Impurities |
Not specified |
Single ion ≤10ppm |
Single ion ≤1ppb |
|
Storage Stability |
12 months (sealed) |
18 months (nitrogen-sealed) |
24 months (nitrogen-sealed) |
|
Packaging Specification |
225KG/steel drum, 1000KG/IBC ton barrel |
200KG/HDPE drum |
180KG/quartz glass-lined drum |
Advantages of Maleic Anhydride
Controlled curing speed
Unsaturation allows formulators to fine-tune gel time and curing profile
01
Improved adhesion
Increased polarity enhances bonding to glass fiber, metals and mineral fillers
02
Better mechanical properties
Optimized crosslink density improves strength and toughness
03
Enhanced chemical resistance
Ester structures improve resistance to solvents and chemicals
04
Improved compatibility
Helps bridge polar and non-polar components in composite systems
05
Benefits of Dimethyl Sulfoxide
Therapeutic Properties
The therapeutic potential of DMSO is one of its most compelling attributes. Its anti-inflammatory properties can help manage pain and swelling in various inflammatory conditions. Clinical studies have shown that topical application of DMSO can yield significant relief for conditions such as arthritis and sports injuries.
Enhancing Drug Delivery
Dimethyl sulfoxide’s remarkable ability to carry drugs through the skin enhances transdermal medication delivery. This characteristic allows it to be a critical component in formulations for treating localized conditions, ensuring higher bioavailability of active pharmaceutical ingredients while minimizing side effects associated with systemic absorption.
Environmental Advantages
As an organic solvent, DMSO stands out due to its low toxicity and environmental safety profile. Unlike many traditional solvents, it does not produce harmful vapors, making it safer for handlers. Furthermore, it biodegrades quickly in the environment, reducing ecological impact.
Chemical Properties of DMSO
Molecular Structure and Physical Characteristics
DMSO is an organosulfur compound with the formula (CH₃)₂SO. It is a colorless, odorless liquid at room temperature, with a melting point of 18.5°C and a boiling point of 189°C. DMSO is highly polar and aprotic, making it an excellent solvent for a wide range of organic and inorganic substances.
Solvent Capabilities
One of the most notable properties of DMSO is its exceptional solvent capabilities. It can dissolve both polar and nonpolar compounds, including salts, making it invaluable in chemical reactions and formulations.
It is used as the material to produce 1, 4-butanediol, γ- butyrolactone, tetrahydrofuran, succinic acid, unsaturated polyester resin, alkyd resin. It is also used in medicine and pesticides.
It is used as collector in metal dressing.
It is used in organic synthesis, and also used as synthetic fiber intermediates.
Maleic anhydride is an important organic chemical compound of unsaturated organic anhydride, which is used to synthesize diethyl maleate, intermediate of malathion, 1-phenyl-3, 6-dihydroxypyridazine, intermediate of pyridazin, and intermediate of pyrethroid insecticides, such as permethrin, fungicide and captan.
It is mainly used in the production of unsaturated polyester resin, alkyd resin, malathion, high efficiency and low toxicity pesticide 4049 and long-acting iodamine. It is also the raw material of coating, maleic rosin, polymaleic anhydride and maleic anhydride styrene copolymer.
Maleic anhydride is an important basic organic chemical raw material. It is the third largest raw material of anhydride in the world after acetic anhydride and phthalic anhydride.
Applications of Dimethyl Sulfoxide
Pharmaceutical Industry
In the pharmaceutical sector, DMSO is employed as a solvent and carrier for drug formulations. Its ability to penetrate biological membranes allows for transdermal drug delivery, facilitating the transport of active pharmaceutical ingredients through the skin.
Agriculture
DMSO's solvent properties are utilized in agriculture for the formulation of pesticides and herbicides. It aids in the efficient delivery of active ingredients, enhancing the effectiveness of agricultural chemicals.
Manufacturing and Electronics
In manufacturing, DMSO serves as a cleaning agent and solvent for polymers and resins. Its high solvency power makes it effective in removing contaminants and residues from equipment and surfaces. In the electronics industry, DMSO is used in the production of semiconductors and as a solvent in photoresist stripping processes.
Storage and Transportation of Maleic Anhydride
Precautions for transportation
The package should be complete and the loading should be safe. During transportation, leakage, collapse, falling and damage of containers shall be prevented. It is strictly forbidden to mix with oxidants, reducing agents, acids, chemicals, etc. During transportation, it should be protected from sunshine, rain and high temperature;
Storage precautions
Store in a cool, dry and well ventilated warehouse. Keep it away from fire and heat source. Keep the container sealed. It should be stored separately from oxidants, reducing agents, acids and chemicals. Fire fighting equipment of corresponding variety and quantity shall be provided. The storage area should be equipped with suitable materials to contain the leakage;
Packaging precautions
Plastic bag or two-layer kraft paper bag with full opening or middle opening steel barrel, plastic bag or two-layer kraft paper bag with fiberboard barrel, plywood barrel, cardboard barrel, plastic bags or plastic buckets (solids) and plastic bucket (liquid).
FAQ
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