杏仁酸 相關
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Mandelic acid is an aromatic alpha hydroxy acid with the molecular formula C 6 H 5 CH (OH)CO 2 H. It is a white crystalline solid that is soluble in water and polar organic solvents. It is a useful precursor to various drugs. The molecule is chiral. The racemic mixture is known as paramandelic acid .
- C₈H₈O₃
- 152.149 g·mol−1
- 119 °C (246 °F; 392 K) optically pure: 132 to 135 °C (270 to 275 °F; 405 to 408 K)
- 15.87 g/100 mL
Ethylenediaminetetraacetic acid ( EDTA ), also called EDTA acid after its own abbreviation, is an aminopolycarboxylic acid with the formula [CH 2 N (CH 2 CO 2 H) 2] 2. This white, water-insoluble solid is widely used to bind to iron (Fe 2+ /Fe 3+) and calcium ions (Ca 2+ ), forming water-soluble complexes even at neutral pH.
- C₁₀H₁₆N₂O₈
- 200-449-4
- 0.860 g cm−3 (at 20 °C)
- 292.244 g·mol−1
Natural occurrence and industrial production Lemons, oranges, limes, and other citrus fruits contain high concentrations of citric acid. Citric acid occurs in a variety of fruits and vegetables, most notably citrus fruits.Lemons and limes have particularly high concentrations of the acid; it can constitute as much as 8% of the dry weight of these fruits (about 47 g/L in the juices).
Amino acid. Structure of a typical L -alpha-amino acid in the "neutral" form. Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. [1] Although over 500 amino acids exist in nature, by far the most important are the 22 α-amino acids incorporated into proteins. [2]
Properties. Production. Uses. Reactions. Health and safety. See also. Notes. References. External links. Acetic acid / əˈsiːtɪk /, systematically named ethanoic acid / ˌɛθəˈnoʊɪk /, is an acidic, colourless liquid and organic compound with the chemical formula CH3COOH (also written as CH3CO2H, C2H4O2, or HC2H3O2 ).
Almond tofu ( Chinese and Japanese: 杏仁豆腐; pinyin: xìngrén dòufǔ; Cantonese Jyutping: hang6 jan4 dau6 fu6; rōmaji: an'nindōfu) is a soft, jellied dessert made of apricot kernel milk, agar, and sugar popular throughout East Asia. The name "tofu" here refers to "tofu-like solid"; soy beans, which are the main ingredient of tofu, are not used. [1] .
Acrylic acid (IUPAC: propenoic acid) is an organic compound with the formula CH2=CHCOOH. It is the simplest unsaturated carboxylic acid, consisting of a vinyl group connected directly to a carboxylic acid terminus. This colorless liquid has a characteristic acrid or tart smell. It is miscible with water, alcohols, ethers, and chloroform. More ...