Browse 961 Chemical Products and Raw Materials
DL-Dithiothreitol
Dithiothreitol is a common reducing agent, also called DTT, which has a strong reducibility. Its reducibility is largely due to the conformational stability of the six membered ring (containing disulfide bond) in its oxidation state. The reduction force is affected by pH value, and can only play a reduction role when pH value is greater than 7. This is because only the deprotonized thiol anion (- S -) has the reaction activity, while mercaptan (- SH) has no activity, while mercaptol PKA is generally ~ 8.3.
DL Tartaric Acid
Tartaric Acid, also called dihydroxysuccinic acid, is a white crystalline naturally occurring carboxylic acid. It is obtained natually as a by-products of wine fermentation along with its salts. Tartaric acid is biodegradable and no pollution problems are known. Tartaric acid is used chiefly in the form of its salts, e.g., cream of tartar (potassium hydrogen tartrate), Rochelle salt (potassium sodium tartrate) and Tartar Emetic (antimony potassium tartrate). It is used to enhance flavours in foods, confectionery and beverages.
DL-monosodium Glutamate
Monosodium glutamate (MSG) is used as a flavor enhancer in food preparation.
DPX-T5648
Used to control annual and perennial grasses and broadleaf weeds on landscapes, rights-of-ways, fence rows, forests, industrial structure areas and non-crop land.
DTPA-FeNa
Product name: sodium ferric diethylenetriaminepentaacetate (DTPA-FeNa)
DYSPROSIUM
Dysprosium is a silvery white metal, which is soft and can be cut with a knife; its melting point is 1412 ° C, boiling point is 2562 ° C, and its density is 8.55g/cm3; it has superconductivity near absolute zero. Dysprosium is quite stable in the air. At high temperature, it is easy to be oxidized by air and water to form dysprosium oxide. Dysprosium is mainly used to make new lighting source dysprosium lamp; dysprosium can be used as control material of reactor; dysprosium compound can be used as catalyst in oil refining industry.
Dactinomycin
Bright red crystalline powder, hygroscopic, gradually lost activity under light. Specific rotation [α] 18d-315 ° (0.02%, methanol). Insoluble in petroleum chemical Book ether, slightly soluble in water, soluble in methanol, ethanol and ethyl acetate, easily soluble in benzene, chloroform and acetone. Extremely toxic, LD50 (rat, oral) 7200 μ g / kg. It is effective in the treatment of malignant hydatidiform mole, nephroblastoma, Hodgkin's disease, testicular tumor, rhabdomyosarcoma, neuroblastoma and reticulosarcoma. With cervical cancer, ovarian cancer, breast cancer and gastrointestinal cancer, there are also some curative effects. Combined with radiotherapy can improve the sensitivity of radiotherapy.
Darunavir
Darunavir (formerly known as TMC114) is a protease inhibitor medication used to treat HIV infection. Darunavir is an OARAC recommended treatment option for treatment-naïve and treatment-experienced adults and adolescents.
Darzalex
On November 16, 2015, the us FDA approved the release of Daratumumab, a new monoclonal antibody drug made by Janssen and marketed under the trade name Darzalex. Clinical use of multiple myeloma after treatment with protease inhibitors and immunosuppressive agents. The bioengineered drug is an anti-cd38 monoclonal antibody that targets a transmembrane extracellular enzyme CD38 molecule highly expressed on the surface of multiple myeloma cells and can induce rapid death of tumor cells through a variety of mechanisms. Because healthy cells and all myeloma cells express CD38, adequate evaluation of drug toxicity and therapeutic efficacy is required.
Daunorubicin Hydrochloride
Orange red crystalline powder was obtained from ethanol. [α] D20-50 ° (C = 0.2, water). UV maximum absorption (methanol): 232.5253480495nm (ε 40225353001048010300). Acute toxicity LD50 mice (mg / kg): 13.66 subcutaneous injection, 4.42 intraperitoneal injection, 8.50 intravenous injection. It is a semi synthetic anti-tumor antibiotic similar to positive dinomycin, and its curative effect is similar to that of adriamycin. It is used for the remission of acute lymphoblastic leukemia and acute primordial leukemia, especially acute monocytic leukemia.
Dazomet
The pure product is white needle crystal, odorless, m.p.99.5 ℃ (decomposition) (104-105 ℃). The vapor pressure is 400 × 10-6pa. Soluble in acetone and chloroform; slightly soluble in ethanol and benzene; insoluble in ether and carbon tetrachloride; solubility in water is 0.12% at 25 ℃, slightly increased in warm water. It is easy to decompose in aqueous solution, and the decomposition speed is accelerated when the temperature is above 45 ℃, which affects the effect of medicament; it is easy to decompose in case of strong acid and alkali. Broad spectrum pesticide. Methyl isothiocyanate, formaldehyde and hydrogen sulfide are decomposed in the soil by the nematicide with fumigation effect, which can kill the root nodule nematode, stem nematode and heterodermic nematode. In addition, it has the functions of killing insects, killing bacteria and weeding.
Decabromodiphenyl Oxide
Decabromodiphenyl ether product is a white fine powder, non corrosive, insoluble in water, ethanol, acetone, benzene and other solvents, slightly soluble in chlorinated aromatic hydrocarbons; solution point: 304-309 ℃, bromine content greater than 82%, specific gravity of 3.02, good stability. The temperature of 5% heat loss was higher than 320 ℃, the thermal stability was good, LD50 was higher than 15% g / kg, it was a non-toxic and pollution-free flame retardant.
Decitabine
It is a kind of natural adenosine analogue of 2 ′ - deoxycytidine acid. It can inhibit the proliferation of tumor cells and prevent the occurrence of drug resistance by inhibiting DNA methyltransferase and reducing DNA methylation. It is the most powerful specific inhibitor of DNA methylation, belonging to S-phase cell cycle specific drug, and is suitable for the treatment of myelodysplastic syndrome (MDS).
Dehydroepiandrosterone
Dehydroepiandrosterone (DHEA), also known as dehydroepiandrosterone, is a cholesterol △ 5, 6 double bond and esterifiable 3 - β - hydroxysterone. Its molecular formula is c19h28o2, molecular weight is 288.41, melting point is 151 ℃ - 153 ℃, optical rotation is + 5.5 °. It is an adrenal hormone secreted by the reticular layer of human adrenal cortex Precursor substances, which have physiological activities such as regulating obesity, preventing diabetes, anti carcinogenesis and virus infection, improving memory, immune response and stress response, reducing tension, are intermediates of steroids, and participate in the synthesis of adrenal hormones.
Denatonium Benzoate Anhydrous
Benzenediammonium is a quaternary ammonium salt formed by the combination of quaternary ammonium salt cations and inert anions such as benzoate ions or saccharin anions. The cation structure of the substance is similar to that of lidocaine, a local anesthetic, except that there is an additional benzyl functional group on the nitrogen atom of the amino group.
Dequalinium Chloride
Dequalinium chloride is a selective blocker of apamin-sensitive K+ channels and inhibitor of XIAP (X-linked inhibitor of apoptosis protein). The compound has induced apoptosis in leukemia B4 cells through disturbance of mitochondrial function, oxidative stress, and downregulation of Raf/MEK/ERK and PI3K/Akt signaling pathways.
Desmopressin Acetate
central diabetes insipidus, nocturnal enuresis and hemophilia, also used for kidney urine concentration function test. Also used for postoperative bleeding.
Dexamethasone
Dexamethasone is one of the commonly used drugs in clinical practice. It is often used with other drugs in clinical practice. It has anti-inflammatory, anti-toxic and anti-allergic effects. However, it has no therapeutic effect on the disease and can only reduce or inhibit the manifestations of inflammation. Therefore, we must pay attention to the clinical medication. Generally, it is not used alone and must be used in conjunction with other drugs to play a better role.
Di(benzothiazol-2-yl) Disulfide
Dibenzothiazole disulfide is a chemical substance with molecular formula of c14h8n2s4 and molecular weight of 332.47. As a general accelerator for natural rubber, synthetic rubber and recycled rubber, it is mainly used to manufacture high-purity DM (medical grade) for tires, inner tubes, rubber belts, rubber shoes and general industrial products, which is an important pharmaceutical intermediate for the manufacture of cephalosporin anti-inflammatory drugs.
Diacetoxyiodo
Multifunctional oxidation and acetification reagents; stoichiometric oxidant in tempo oxidation of neritol to nerolaldehyde; oxidant in rhodium catalyzed acridine reaction of alkene with sulfamate; 2-arylation of indole catalyzed by palladium at room temperature; reagents for synthesis of various heterocyclic compounds; Vic glycol cracking agent, hydroxylation and many oxidation reactions It is used for the preparation of thermal labile substance iodobenzene.
Diafenthiuron
White crystal, m.p.149.6 ℃, vapor pressure 2 × 10-6pa (220 × 10-9pa (20 ℃). Solubility at 20 ℃: dichloromethane 600g / L, cyclohexanone 380g / L, toluene 320G / L, acetone 280g / L, xylene 210g / L, hexane 8g / L, water 0.05mg/l. Stable to light. Thiourea insecticides and acaricides. It is mainly used in cotton, fruit trees, vegetables, ornamental plants, soybeans and other crops to control all kinds of mites, whiteflies, Plutella xylostella, Pieris rapae, aphids, leafhoppers, leafminers, scale insects and other pests and mites. The recommended dosage is 0.75-2.3g active ingredient / 100m2, with a duration of 21 days. The potion is safe for natural enemies.
Diammonium Phosphate
Diammonium phosphate (DAP) (chemical formula (NH4)2HPO4, IUPAC name diammonium hydrogen phosphate) is one of a series of water-soluble ammonium phosphate salts that can be produced when ammonia reacts with phosphoric acid. Solid diammonium phosphate shows a dissociation pressure of ammonia as given by the following expression and equation:
Diantimony Trioxide
Antimony trioxide is a white powder with a density of 5.67g/cm3. It turns yellow when heated and turns white when cooled. At 656 ℃, it melts into light yellow or gray liquid, and then turns into white asbestos like substance with mercerization after cooling. Antimony trioxide is slightly soluble in water, ethanol and dilute acid, easily soluble in concentrated hydrochloric acid, oxalic acid and tartaric acid solution, also soluble in fuming nitric acid and fuming sulfuric acid, and soluble in alkali to form antimonate. Antimony trioxide is not toxic, but it can irritate the nose, eyes, throat and respiratory tract. It can induce dermatitis in contact with skin.
