welinkschem

1,4-Butanediol Diglycidyl Ether - Welinkschem Manufacturer : 1,4-Butanediol diglycidyl ether (BDDE) is a viscous liquid , which is hygroscopic in nature. 1,4-Butanediol Diglycidyl Ether Introduction: 1,4-Butanediol  diglycidyl ether synonym(s): 1,4-Bis (2,3-epoxypropyloxy) butane Empirical Formula (Hill Notation): C10H18O4 CAS Number: 2425-79-8 Molecular Weight: 202.25 Beilstein: 115238 EC Number: 219-371-7 MDL number: MFCD00005146 PubChem Substance ID: 24853198 Properties: vapor pressure ~10 mmHg ( 20 °C) Quality Level: 200 Assay: ≥95% Form: liquid Refractive Index: n20/D 1.453 (lit.) bp:266 °C (lit.) Density: 1.1 g/mL at 25 °C (lit.) 1,4-Butanediol diglycidyl ether (BDDE) is a viscous liquid , which is hygroscopic in nature. BDDE is the most commonly used homobifunctional epoxide compound. BDDE may react with amines, hydroxyls, sulfhydryl groups to produce secondary amines, ether or thioether bonds respectively. Application: BDDE is a cross linking agent used for preparing amylos...

Long-term toxicity and carcinogenicity studies with 2,4/2,6-toluene-diisocyanate in rats and mice Groups of male and female rats and mice were exposed to 0.05 and 0.15 ppm of  2.6-toluene-diisocyanate  ( TDI ) by inhalation for 6 h/day, 5 days/week for approx. 2 years. Type and incidence of tumours and the number of tumour-bearing animals of either species did not indicate any carcinogenic effect. Haematology, biochemistry, urinalysis, and cytogenicity did not reveal any untoward effect. Increased mortality (females only), reduced weight gain and signs of irritation in the upper and lower respiratory tract resulted from exposure to TDI in the mouse study with the highest incidence in the 0.15 ppm exposure level. Male and female rats of the 0.15 ppm group gained less weight-during the first 12 weeks of the study. Histopathological examination in the rat study has not been completed, but no effect in the respiratory tract or in any other tissue has yet been seen.

N-Vinyl-2-Pyrrolidinone | NVP | N-Vinyl Pyrrolidone - Welinkschem : N-Vinyl-2-Pyrrolidinone Other names 2-Pyrrolidinone, 1-ethenyl1.3 CAS No. 88-12-0 Molecular and Structural Formula C6H9NO Characteristics: –A colorless to slightly yellowish transparent liquid; –Soluble in water and a variety of organic solvents;–Reactive and susceptible to hydrolyzation and polymerization; No Tests Specification 1 Purity,% ≥99.5% 2 Denstiy, g/ml 1.03-1.04 3 Water,% ≤0.2 4 2-Pyrrolidone,% ≤0.2 5 Freezing point(℃) 13.0-14.0 6 Color, APHA ≤60 N-Vinyl-2-Pyrrolidinone Application: –An important monomer for varieties of homopolymers and copolymers; –A reactive diluent in UV curable coating for plastic, wood, metal, inks, electronics, adhesives etc; Packaging and Storage –Packed in 200 kg net galvanized iron drum; –Stored away from sunlight and high temperature;

What kind of substance is THF? What kind of substance is THF? THF  is a chemical reagent of thorium fluoride.   Alias:  tetrahydrofuran , 1.4-epoxybutane, tetramethylene oxide, oxyheterocyclic pentane, monooxypentacyclic, tetrahydroxycyclocene, polytetramethylether glycol, tetramethylene oxide, oxyheterocyclic pentane, monooxyacyclic   CAS: 109-99-9 Molecular formula: C4H8O Molecular weight: 72.11 PSA 9.23000 LogP 0.79680 Merck 9211 Refractive index n20/D 1.40 Miscible Boiling point 65-67 ° C (l In industrial production, sugar aldehyde was first used as raw material. The mixture of sugar aldehyde and steam was introduced into the reactor filled with zinc chromium manganese metal oxide (or palladium) catalyst, and the carbonyl group was removed at 400-420 ℃ to form furan; Then tetrahydrofuran was prepared by hydrogenation of furan at 80-120 ℃ using skeleton nickel as catalyst. The production of 1 ton of tetrahydrofuran by this method requires about 3 tons of polysacch...

Forecast and analysis on the market status and development trend of China's BDO industry in 2023  China Business Information Network News:  BDO , as an important basic raw material for fine chemicals, is widely used in textile, chemical and other fields, among which PTMEG and PBT engineering plastics are the traditional application fields of BDO. Under the background of “carbon peak” and “carbon neutralization”, in order to reduce carbon emissions, emerging fields in the chemical industry, such as biodegradable materials, new energy vehicles, thermoplastic elastomers, are expected to lead the new development of low-carbon chemical industry. As an important basic chemical raw material for biodegradable materials, new energy vehicles, thermoplastic elastomers and other industries,  BDO  will usher in new growth points of the industry.   Operating rate analysis   BDO is widely used as the synthetic raw material of PBS series biodegradable materials, and is an ...

What kinds of products may use NMP(N-methylpyrrolidone)? N-Methylpyrrolidone ( NMP ) harms the developing fetus when tested in pregnant animals. It is toxic to the reproductive system of male and female test animals. The reproductive effects of NMP( N-methylpyrrolidone ) have not been studied in humans. Based on the animal tests, you should treat NMP as a potential human reproductive hazard. Overexposure to NMP irritates the eyes, skin, nose, and throat. It can also affect the central nervous system or brain causing symptoms of drunkenness similar to the effects of drinking alcohol. NMP is easily absorbed through the skin. It is widely used to replace methylene chloride and other chlorinated solvents that harm the environment and health. HESIS revised this Health Hazard Advisory to inform workers and employers that Cal/OSHA has adopted a Permissible Exposure Limit for this substance. What kinds of products may use NMP(N-methylpyrrolidone)? Paint strippers Polyurethane paints Waterborne...

4-Methyl-m-phenylene diisocyanate; TDI;  Toluene-2,4-diisocyanate ; Tolyelenediisocyanate; CRESORCINOL DIISOCYANATE; 2,4-TDI; 2,4-TOLUENEDIISOCYANATE; 2，4-Tolylene diisocyanate; 2,4-DIISOCYANATOTOLUENE; 1-METHYL-1,3-PHENYLENE DIISOCYANATE; 4-METHYL-1,3-PHENYLENE DIISOCYANATE; Toluene 2,4-diisocyanate