Dichloromethyltriethoxysilane (CAS 19369-03-0), also written as (dichloromethyl)triethoxysilane or silane, (dichloromethyl)triethoxy-, is a colourless transparent organosilicon liquid in which a dichloromethyl group is attached to a silicon atom bearing three ethoxy substituents. It is moisture sensitive and hydrolyses on contact with water or humid air, releasing ethanol and hydrogen chloride, so it is stored sealed under
This compound (CAS 200000-59-5), chemically (2R,3S)-2-[(1R)-1-[3,5-bis(trifluoromethyl)phenyl]ethoxy]-3-(4-fluorophenyl)morpholine 4-methylbenzenesulfonate, is an advanced chiral intermediate in the manufacture of the antiemetic drug aprepitant. It is a solid that should be stored dry, cool and protected from light and moisture, and it is catalogued as a pharmaceutical intermediate rather than a finished active substance. The molecule carries several defined
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Betaine citrate (CAS 17671-50-0), also called trimethylglycine citrate or the citric acid salt of the quaternary ammonium zwitterion betaine, is a white to off-white crystalline, highly water-soluble powder with a mildly acidic and pleasant taste and good stability under normal storage conditions. It combines two complementary functions: betaine is a natural osmolyte and methyl-group donor
This compound (CAS 1803573-21-8), named 2-(bis(tert-butoxycarbonyl)amino)-5-bromopyridin-3-yl 4-methylbenzenesulfonate or imidodicarbonic acid 2-[5-bromo-3-[[(4-methylphenyl)sulfonyl]oxy]-2-pyridinyl]-, 1,3-bis(1,1-dimethylethyl) ester, is a heavily functionalised pyridine building block supplied as a solid at 98 percent purity for laboratory and manufacturing use. Three reactive sites coexist in the molecule: an aryl bromide, a tosylate ester and two acid-labile tert-butoxycarbonyl groups, so it must be
2-(Bis(tert-butoxycarbonyl)amino)-5-bromopyridin-3-yl 4-methylbenzenesulfonate Read More »
This compound (CAS 185225-84-7) is the (1S,2R)-2-fluorocyclopropanamine 4-methylbenzenesulfonate salt, the optical antipode of the corresponding (1R,2S) derivative and known in the impurity literature as sitafloxacin impurity 20 or Citafloxacin impurity 15. It is a white to off-white crystalline solid with high chiral purity, soluble in water and polar organic solvents and supplied at 99 percent
-2-Fluorocyclopropanamine 4-methylbenzenesulfonate Read More »
Ethyl 2-(2-chloroethoxy)acetate (CAS 17229-14-0), also listed as ethyl 2-chloroethoxyl acetic acid or ethyl 2-chloroethoxy acetate, is a colourless liquid bifunctional ester containing a reactive primary alkyl chloride and an ethyl ester on a short glycol-like backbone. It is stored sealed, dry and refrigerated at two to eight degrees Celsius because the chloroether linkage is sensitive
L-Leucine benzyl ester p-toluenesulfonate (CAS 1738-77-8), commonly abbreviated H-Leu-OBzl.TosOH, is the crystalline tosylate salt of the benzyl ester of L-leucine and is classified as a dangerous good for transport. It is a white to off-white solid that dissolves in methanol, ethanol, dimethylformamide and dichloromethane and is stable in storage when kept dry and cool away
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H-Phe-OBzl.TosOH, or L-phenylalanine benzyl ester p-toluenesulfonate (CAS 1738-78-9), is the tosylate salt of the benzyl ester of L-phenylalanine. It is a white crystalline solid with good storage stability when kept dry, and it is soluble in polar aprotic and alcoholic solvents such as dimethylformamide, dimethyl sulfoxide, methanol and dichloromethane, and only sparingly soluble in water.
Linezolid mesylate ester (CAS 174649-09-3), also known as linezolid related compound D, Linezolid USP Related Compound D or (R)-[3-(3-fluoro-4-morpholinophenyl)-2-oxooxazolidin-5-yl]methyl methanesulfonate, is a white to off-white crystalline solid supplied at 99 percent purity in quantities ranging from ten milligrams to several grams. It is the mesylate ester of the oxazolidinone alcohol at the heart of the
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Lead(II) methanesulfonate (CAS 17570-76-2) is a water-soluble lead salt normally supplied as a 50 percent by weight aqueous solution, a clear colourless to slightly yellow liquid with a density noticeably above that of water and no strong odour. Because lead ions are neurotoxic, bioaccumulative and classified as reproductive and developmental toxins, the material is regulated
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Disodium 1,5-naphthalenedisulfonate (CAS 1655-29-4) is a water-soluble naphthalene disulfonic acid salt in which the two sulfonate groups occupy positions 1 and 5, giving a linear, symmetric and rigid anionic scaffold. It is a white to off-white crystalline solid, freely soluble in water and sparingly soluble in organic solvents, and it is thermally stable under ordinary
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L-Valine benzyl ester p-toluenesulfonate (CAS 16652-76-9), commonly written H-Val-OBzl.TosOH, is the crystalline tosylate salt of the benzyl ester of L-valine. It is a white to off-white solid melting near 160 to 162 degrees Celsius, soluble in polar organic solvents such as methanol, ethanol, dichloromethane and dimethylformamide, and it is stable when kept dry and cool.
O-Benzyl-L-valine toluene-p-sulphonate Read More »
2-Methoxyethyl p-toluenesulfonate (CAS 17178-10-8), also named 2-methoxyethyl 4-methylbenzenesulfonate, p-toluenesulfonic acid 2-methoxyethyl ester or 2-methoxyethyl tosylate, is the tosylate ester of 2-methoxyethanol. It is a colourless to pale yellow liquid with a boiling point near 141 degrees Celsius at reduced pressure and a purity of 98 percent or higher by gas chromatography, and it is supplied
Ethanol, 2-methoxy-, 4-methylbenzenesulfonate Read More »
Sodium 2-chloroethanesulfonate monohydrate (CAS 15484-44-3) is a water-soluble, crystalline alkyl sulfonate salt containing a reactive carbon-chlorine bond at the beta position, with a melting point near 292 to 296 degrees Celsius and a density of about 1.58 grams per cubic centimetre. It is a light orange to white solid that is thermally stable and easily
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4-(Ethoxyethoxy)styrene (CAS 157057-20-0), also called 1-ethenyl-4-(1-ethoxyethoxy)benzene or 1-(1-ethoxyethoxy)-4-vinylbenzene, is a colourless to pale yellow transparent liquid styrene derivative in which the phenolic hydroxyl of 4-hydroxystyrene has been masked as an acid-labile ethoxyethyl acetal. Commercial material is stabilised with a small amount of tert-butylcatechol to prevent spontaneous polymerisation, and purity is typically 98 percent or higher
This compound (CAS 160969-00-6), also named 2-[2-(2,2,2-trifluoroethoxy)phenoxy]ethyl bromide or 1-(2-bromoethoxy)-2-(2,2,2-trifluoroethoxy)benzene, is a colourless transparent liquid aryl alkyl bromide with a density of about 1.5 grams per cubic centimetre and a purity of 98 percent or higher. As the name implies it contains both a trifluoroethoxy-substituted aromatic ring and a reactive 2-bromoethyl ether chain, and it
