The following is a description of the main properties of Di(trimethylol propane) (DTMP, 98% purity), covering physical properties, chemical properties, and common characteristics:
I. Physical Properties
Appearance and State
At room temperature, it is a white crystalline powder or granules. When the purity is high, the crystal structure is regular. When the impurity content is low, it may be slightly yellowish.
In solid state, it has certain hygroscopicity and may gradually cake when exposed to a humid environment.
Melting Point and Boiling Point
Melting Point: Approximately 108-112°C (slightly different due to different purities, and the melting point of the 98% - pure product is close to the theoretical value).
Boiling Point: It is prone to decomposition under normal pressure, with no definite boiling point. Distillation needs to be carried out under reduced pressure (usually for purification).
Solubility
Water: It is soluble in hot water, with a relatively low solubility at room temperature (about several grams per 100 mL of water), and the solubility increases significantly when heated.
Organic Solvents: It is easily soluble in polar solvents such as methanol, ethanol, acetone, and ethyl acetate, and slightly soluble in aliphatic hydrocarbon solvents (such as n - hexane).
Density and Bulk Density
Density (solid): Approximately 1.15-1.20 g/cm³ (the measured value varies slightly with the crystal form).
II. Chemical Properties
Functional Group Reactivity
The molecule contains four hydroxyl groups (-OH), which have strong nucleophilicity and are prone to participate in reactions such as esterification, etherification, and condensation. This is a typical characteristic of polyol intermediates.
The hydroxyl groups can undergo esterification reactions with acids (such as fatty acids, acrylic acid, etc.) to form polyol esters (used in lubricants, resins, etc.).
Thermal Stability
It is prone to dehydration or decomposition at high temperatures (especially above 200°C), releasing an irritating odor (high - temperature exposure should be avoided).
Under acidic or alkaline conditions, the reactivity of the hydroxyl groups may increase, and attention should be paid to the acidity and alkalinity of the storage environment.
Safety
Toxicity: It belongs to low - toxicity chemicals (referring to the toxicity data of similar polyols such as trimethylol propane), but direct contact with the skin or mucous membranes may cause mild irritation.
Flammability: It is flammable. When burned, it produces carbon dioxide and water vapor, without special toxic gases (but the formation of explosive dust should be avoided).
III. Common Characteristics (Based on 98% Purity)
Purity and Impurities
The impurities in the 98% - pure product are mainly unreacted trimethylol propane (TMP), condensation by - products, or moisture. Chromatographic analysis (such as GC or HPLC) is required to confirm the specific impurity content.
Hygroscopicity and Storage
It should be stored in a sealed container in a cool and dry place to avoid caking due to moisture (recommended storage temperature: <30°C, humidity < 60%).
Industrial Applicability
Due to its high purity and low impurity content, it is suitable for scenarios with high requirements for reaction selectivity (such as pharmaceutical intermediates, high - end resin synthesis).
IV. Typical Application Scenarios
The polyhydroxyl structure of DTMP makes it a key intermediate in the chemical industry chain, mainly used for:
- Synthetic Resins: Reacting with acrylic acid, isocyanate, etc. to produce polyester resins and polyurethane resins (used in coatings, adhesives).
- Synthetic Lubricants: Preparing high - temperature - stable lubricants (such as aviation lubricating oil, metalworking fluids).
- PVC Stabilizers: Compounding with metal soaps to improve the thermal stability and processing performance of PVC.
- Surfactants: As a raw material for hydrophilic groups to synthesize non - ionic surfactants (such as emulsifiers, dispersants).
For more specific technical parameters (such as characteristic peaks in the infrared spectrum, hydroxyl value determination methods, etc.), the product specification sheet or test standard can be further provided.
Dalian Sinobio Chemistry Co.,Ltd was established in 2011 and located in beautiful costal city .We focus on fungicide and water treatment's production and export over 14 years.
Sinobio is a group company who has 2 production sites in China: One is in Jiangxi province which produce fungicide such as lsothiazolinon,BIT,Zinc Pyrithione ,etc.Our products can be widely used in the fields of oil-field water injection, pulp and paper making,water treatment,marine paint, wood, plastic leather,paint coating,cosmetics,personal care products, textiles, fiber, building materials,etc. for sterilization,corrosion prevention and mildew prevention.In particular, it has been widely recognized in the application of sterilization,algae killing,scale inhibition and corrosion inhibition of circulating cooling water in petrochemical, power metallurgy and other industrial fields.
The other one was located in Gansu province which produce water treatment chemicals such as ATMP, HEDP,THPS,TXP etc .Our company has realized the research and development, production and sales of products and provided a series of services such as water treatment engineering solutions. The products are widely used in electric power,chemical industry, metallurgy, textile,paper making, washing, building mate- rials and other fields.
All these products are exported to Europe,America,Southeast Asia and other parts of the world, and have won the praise of custom.
SINOBIO Warmly welcome customers from at home and abroad to cooperate with us for common success.
Why choose us
1.Can I get samples ?
Yes, we can supply specified quantity free sample, you pay for the freight charge only.
2.Which documents do you support?
We can supply COA, TDS, MSDS and so on.
3.What is your MOQ?
Normally speaking, our MOQ is 1 standard package. But we can supply free sample for testing before mass order.
4.How can you guarantee the quality of your products?
Our staff are all experienced in chemical products or related major background, they are well trained before quotation.
Free sample or pre- shipment sample are available for our new cooperation before you place commercial order. We are sure the same specification commercial products as sample to customers.
Third Party Inspection like SGS can be arranged according to your requirement before shipping.
On-Spot QC in our APPROVED associated production bases with necessary certification like GMP, ISO etc.
5.How to pay?
PI will be sent firstly after our aligned products specification. Payment by T/T, X-Transfer ,LC and so on.
6.What is your after-sales service?
SINOBIO aim to keep long term cooperation with all the customers, will sign a legally binding sales contract with customers for every order. If you have doubt or concern on our products or service, pls feel free to contact with us. SINOBIO will be responsible for identifying the cause of the problem and proposing corresponding solutions until the customer approved. The approved solution will be firmly carried out.
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