Organic reagents
From early AD to mid-19 century, people mainly use the natural organic substance (such as animal and plant extracts) for qualitative analysis or quantitative analysis. From the second half of the 19th century to the 1920s, it had begun to appear of artificially synthetic organic reagent such as using potassium acetate xanthan for test of nickel, copper, and molybdenum; using morin for test of aluminum; using diazo coupling reaction for the detection of Nitrite; using α-β-nitroso naphthol for detection of cobalt; using dimethyglyoxime for nickel test.
After the proposal of the special-effects group in the 1930s and the proposal of theoretical analysis of functional groups theory in 1950s, people had carried out large-scale screen of organic reagents in search of special-effects analysis groups for different ions and had successfully synthesized a lot of agents of practical value (such as copper reagents, new copper agent, cadmium reagents, beryllium reagent, thorium reagents, etc.). Before the 1950s, the complex compound, in analytic chemistry, is mainly used in the aspects of the precipitation reaction of a binary chelate for the qualitative detection, precipitate isolation and gravimetric separation and other aspects. In the early 1950s and 1960, it is mainly in the form of complexometric titration. From the beginning of the late 1960s, the main focus has been moved to the photometric analysis. Meanwhile, it has been also developed of chelate organic solvent extraction.
8-hydroxy quinoline, hydrazones, oximes, hydroxamic acids, polyphenols, 1, 10-phenanthroline, phosphorus-oxygen extractant, β- diketones, triphenylmethane acid dye, xanthene dyes and azo dyes and other agents has all been widely studied and applied. On the other hand, the structural theoretical research (such as electronic effects, spatial effects and substituent effects) of the organic reagent can further facilitate the development of new-type organic reagents such as heterocyclic azo reagent. During this period, it has been also developed of monoazo chromotropic acid-type and disazo chromotropic acid-type reagent. During the mid-1970s, the chelating resin and adsorbents have achieved rapid development. Since the 1980s, Chinese researchers of analytical chemistry have made progress in the field of the synthesis and application of asymmetric disazo chromotropic acid.
Organic chemical reagents have wide application in analytic chemistry and are mainly used in solvents, precipitation agents, complexing agents, indicator, coloring reagent and surface active agent, etc. In order to adapt to a variety of analytical needs, sometimes it is required to purify certain reagents. For example, liquid organic reagent is often purified by distillation while solid substance is often purified through crystallization and sublimation. Substance having a high vapor pressure, namely having low purification boiling point and undergoing no decomposition under boiling temperature commonly applied atmospheric distillation; for less volatile and water-insoluble substance, namely having high purification point or undergoing decomposition under boiling temperature, we can apply vacuum distillation or steam distillation for purification of it.
Distillation is a commonly used method for laboratory purification of organic reagent. Conventional distillation apparatus generally comprises distiller, condenser and receiver, three parts with auxiliary section also containing heater, a thermometer, a wetted tube and cork.
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- Structure:
- Chemical Name:
- Methyl 5-chloro-2-nitrobenzoate
- CAS:
- 51282-49-6
- MF:
- C8H6ClNO4
- Structure:
- Chemical Name:
- Heptanoyl chloride
- CAS:
- 2528-61-2
- MF:
- C7H13ClO
- Structure:
- Chemical Name:
- Bis[2-(2-hydroxyethoxy)ethyl] ether
- CAS:
- 112-60-7
- MF:
- C8H18O5
- Structure:
- Chemical Name:
- Tetrabutylammonium hexafluorophosphate
- CAS:
- 3109-63-5
- MF:
- C16H36F6NP
- Structure:
- Chemical Name:
- 2-Bromobutyric acid
- CAS:
- 80-58-0
- MF:
- C4H7BrO2
- Structure:
- Chemical Name:
- cis-Vaccenic acid
- CAS:
- 506-17-2
- MF:
- C18H34O2
- Structure:
- Chemical Name:
- 2-Chlorocyclohexanone
- CAS:
- 822-87-7
- MF:
- C6H9ClO
- Structure:
- Chemical Name:
- 3,5-Dichlorobenzonitrile
- CAS:
- 6575-00-4
- MF:
- C7H3Cl2N
- Structure:
- Chemical Name:
- Methyl 3,4-diaminobenzoate
- CAS:
- 36692-49-6
- MF:
- C8H10N2O2
- Structure:
- Chemical Name:
- Cyclohexylacetic acid
- CAS:
- 5292-21-7
- MF:
- C8H14O2
- Structure:
- Chemical Name:
- 3,4-Methylenedioxyacetophenone
- CAS:
- 3162-29-6
- MF:
- C9H8O3
- Structure:
- Chemical Name:
- Methyl trimethylacetate
- CAS:
- 598-98-1
- MF:
- C6H12O2
- Structure:
- Chemical Name:
- 5-Fluorosalicylaldehyde
- CAS:
- 347-54-6
- MF:
- C7H5FO2
- Structure:
- Chemical Name:
- Dioctylamine
- CAS:
- 1120-48-5
- MF:
- C16H35N
- Structure:
- Chemical Name:
- Ethylene glycol monoethyl ether acetate
- CAS:
- 111-15-9
- MF:
- C6H12O3
- Structure:
- Chemical Name:
- 2,2-Bis(bromomethyl)propane-1,3-diol
- CAS:
- 3296-90-0
- MF:
- C5H10Br2O2
- Structure:
- Chemical Name:
- 1,4-Naphthoquinone
- CAS:
- 130-15-4
- MF:
- C10H6O2
- Structure:
- Chemical Name:
- 1,4,7,10-TETRAAZACYCLODODECANE TETRAHYDROCHLORIDE
- CAS:
- 10045-25-7
- MF:
- C8H21ClN4
- Structure:
- Chemical Name:
- SODIUM 1-UNDECANESULFONATE
- CAS:
- 5838-34-6
- MF:
- C11H25NaO3S
- Structure:
- Chemical Name:
- 2-Chloro-3',4'-dihydroxyacetophenone
- CAS:
- 99-40-1
- MF:
- C8H7ClO3
- Structure:
- Chemical Name:
- 4-(4-FLUOROPHENYL)-3-THIOSEMICARBAZIDE
- CAS:
- 330-94-9
- MF:
- C7H8FN3S
- Structure:
- Chemical Name:
- Borane tert-butylamine complex
- CAS:
- 7337-45-3
- MF:
- C4H11BN
- Structure:
- Chemical Name:
- Methyl DL-mandelate
- CAS:
- 4358-87-6
- MF:
- C9H10O3
- Structure:
- Chemical Name:
- 2,4,6-Trimethylphenylboronic acid
- CAS:
- 5980-97-2
- MF:
- C9H13BO2
- Structure:
- Chemical Name:
- 2-METHYLPYRIDINE-3-BORONIC ACID
- CAS:
- 899436-71-6
- MF:
- C6H8BNO2
- Structure:
- Chemical Name:
- Trichlorovinylsilane
- CAS:
- 75-94-5
- MF:
- C2H3Cl3Si
- Structure:
- Chemical Name:
- 2-Amino-4-nitro anisidine
- CAS:
- 99-59-2
- MF:
- C7H8N2O3
- Structure:
- Chemical Name:
- 1,2-Bis(trimethylsilyloxy)ethane
- CAS:
- 7381-30-8
- MF:
- C8H22O2Si2
- Structure:
- Chemical Name:
- 2-Benzyloxyphenylboronic acid
- CAS:
- 190661-29-1
- MF:
- C13H13BO3
- Structure:
- Chemical Name:
- 3-Chlorobenzonitrile
- CAS:
- 766-84-7
- MF:
- C7H4ClN
- Structure:
- Chemical Name:
- 1,1-DIPHENYL-2-THIOUREA
- CAS:
- 3898-08-6
- MF:
- C13H12N2S
- Structure:
- Chemical Name:
- N-CYCLOHEXYLHYDROXYLAMINE HYDROCHLORIDE
- CAS:
- 25100-12-3
- MF:
- C6H14ClNO
- Structure:
- Chemical Name:
- 4'-Hydroxy-3'-methylacetophenone
- CAS:
- 876-02-8
- MF:
- C9H10O2
- Structure:
- Chemical Name:
- 2,2,2-Tribromoethanol
- CAS:
- 75-80-9
- MF:
- C2H3Br3O
- Structure:
- Chemical Name:
- 3-Chloropropylmethyldimethoxysilane
- CAS:
- 18171-19-2
- MF:
- C6H15ClO2Si
- Structure:
- Chemical Name:
- 2-(N-Morpholino)ethanesulfonic acid potassium salt
- CAS:
- 39946-25-3
- MF:
- C6H12KNO4S
- Structure:
- Chemical Name:
- 3,4-DIMETHYLTHIOPHENOL
- CAS:
- 18800-53-8
- MF:
- C8H10S
- Structure:
- Chemical Name:
- 2,4-Dimethylbenzenethiol
- CAS:
- 13616-82-5
- MF:
- C8H10S
- Structure:
- Chemical Name:
- MES monohydrate
- CAS:
- 145224-94-8
- MF:
- C6H15NO5S
- Structure:
- Chemical Name:
- 4-Methoxybenzophenone
- CAS:
- 611-94-9
- MF:
- C14H12O2
- Structure:
- Chemical Name:
- 2-Methoxybenzylamine
- CAS:
- 6850-57-3
- MF:
- C8H11NO
- Structure:
- Chemical Name:
- Thiodiglycolic acid
- CAS:
- 123-93-3
- MF:
- C4H6O4S
- Structure:
- Chemical Name:
- Ethoxyacetic acid
- CAS:
- 627-03-2
- MF:
- C4H8O3
- Structure:
- Chemical Name:
- Cyclobutanecarbonyl chloride
- CAS:
- 5006-22-4
- MF:
- C5H7ClO
- Structure:
- Chemical Name:
- N-(Trimethylsilyl)acetamide
- CAS:
- 13435-12-6
- MF:
- C5H13NOSi
- Structure:
- Chemical Name:
- (4-CHLORO-3-TRIFLUOROMETHYL)PHENYLTHIOUREA
- CAS:
- 207919-03-7
- MF:
- C8H6ClF3N2S
- Structure:
- Chemical Name:
- 3,5-Bis(trifluoromethyl)phenylacetic acid
- CAS:
- 85068-33-3
- MF:
- C10H6F6O2
- Structure:
- Chemical Name:
- 4-TERT-BUTYLTHIOPHENOL
- CAS:
- 2396-68-1
- MF:
- C10H14S
- Structure:
- Chemical Name:
- Sodium 3-[[(dimethylamino)thioxomethyl]thio]propanesulphonate
- CAS:
- 18880-36-9
- MF:
- C6H14NNaO3S3
- Structure:
- Chemical Name:
- 5-BROMO-2-METHOXYBENZYL ALCOHOL
- CAS:
- 80866-82-6
- MF:
- C8H9BrO2
- Structure:
- Chemical Name:
- (R)-(+)-1,2-Dithiolane-3-pentanoic acid
- CAS:
- 1200-22-2
- MF:
- C8H14O2S2
- Structure:
- Chemical Name:
- Methyl palmitate
- CAS:
- 112-39-0
- MF:
- C17H34O2
- Structure:
- Chemical Name:
- Dimethyl sebacate
- CAS:
- 106-79-6
- MF:
- C12H22O4
- Structure:
- Chemical Name:
- Cyclohexanol
- CAS:
- 108-93-0
- MF:
- C6H12O
- Structure:
- Chemical Name:
- 3,5-HEPTANEDIONE
- CAS:
- 7424-54-6
- MF:
- C7H12O2
- Structure:
- Chemical Name:
- Ethyl 2,3-dibromopropionate
- CAS:
- 3674-13-3
- MF:
- C5H8Br2O2
- Structure:
- Chemical Name:
- tert-Butylisocyanate
- CAS:
- 1609-86-5
- MF:
- C5H9NO
- Structure:
- Chemical Name:
- 3-Aminocrotononitrile
- CAS:
- 1118-61-2
- MF:
- C4H6N2
- Structure:
- Chemical Name:
- O-ALLYLHYDROXYLAMINE HYDROCHLORIDE
- CAS:
- 38945-21-0
- MF:
- C3H8ClNO
- Structure:
- Chemical Name:
- PHENYL VINYL SULFIDE
- CAS:
- 1822-73-7
- MF:
- C8H8S
- Structure:
- Chemical Name:
- DL-sec-Butyl acetate
- CAS:
- 105-46-4
- MF:
- C6H12O2
- Structure:
- Chemical Name:
- TERT-BUTYL METHYL MALONATE
- CAS:
- 42726-73-8
- MF:
- C8H14O4
- Structure:
- Chemical Name:
- Bromotrichloromethane
- CAS:
- 75-62-7
- MF:
- CBrCl3
- Structure:
- Chemical Name:
- 1-(2,4-DIMETHOXYPHENYL)-2-THIOUREA
- CAS:
- 35696-77-6
- MF:
- C9H12N2O2S
- Structure:
- Chemical Name:
- 4-(Trifluoromethyl)phenacyl bromide
- CAS:
- 383-53-9
- MF:
- C9H6BrF3O
- Structure:
- Chemical Name:
- Bis(2-ethylhexyl) adipate
- CAS:
- 103-23-1
- MF:
- C22H42O4
- Structure:
- Chemical Name:
- Glutaric acid
- CAS:
- 110-94-1
- MF:
- C5H8O4
- Structure:
- Chemical Name:
- Propionic anhydride
- CAS:
- 123-62-6
- MF:
- C6H10O3
- Structure:
- Chemical Name:
- Dichloroacetonitrile
- CAS:
- 3018-12-0
- MF:
- C2HCl2N
- Structure:
- Chemical Name:
- Diethoxydimethylsilane
- CAS:
- 78-62-6
- MF:
- C6H16O2Si
- Structure:
- Chemical Name:
- Acenaphthene
- CAS:
- 83-32-9
- MF:
- C12H10
- Structure:
- Chemical Name:
- 3-Nitrotoluene
- CAS:
- 99-08-1
- MF:
- C7H7NO2
- Structure:
- Chemical Name:
- Ethylene thiourea
- CAS:
- 96-45-7
- MF:
- C3H6N2S
- Structure:
- Chemical Name:
- Tris(dimethylaminomethyl)phenol
- CAS:
- 90-72-2
- MF:
- C15H27N3O
- Structure:
- Chemical Name:
- Dodecanedioic acid
- CAS:
- 693-23-2
- MF:
- C12H22O4
- Structure:
- Chemical Name:
- 3,5-BIS(TRIFLUOROMETHYL)BENZENESULFONYL CHLORIDE
- CAS:
- 39234-86-1
- MF:
- C8H3ClF6O2S
- Structure:
- Chemical Name:
- 4,6-DIMETHYLDIBENZOTHIOPHENE
- CAS:
- 1207-12-1
- MF:
- C14H12S
- Structure:
- Chemical Name:
- 3-Chloro-1,2-propanediol
- CAS:
- 96-24-2
- MF:
- C3H7ClO2
- Structure:
- Chemical Name:
- 4'-Methylpropiophenone
- CAS:
- 5337-93-9
- MF:
- C10H12O
- Structure:
- Chemical Name:
- 3-Nitrophthalic anhydride
- CAS:
- 641-70-3
- MF:
- C8H3NO5
- Structure:
- Chemical Name:
- 6-Amino-m-cresol
- CAS:
- 2835-98-5
- MF:
- C7H9NO
- Structure:
- Chemical Name:
- Methyl 3-methoxyacrylate
- CAS:
- 34846-90-7
- MF:
- C5H8O3
- Structure:
- Chemical Name:
- 3-Methylbenzyl cyanide
- CAS:
- 2947-60-6
- MF:
- C9H9N
- Structure:
- Chemical Name:
- 4-Isopropoxylphenylboronic acid
- CAS:
- 153624-46-5
- MF:
- C9H13BO3
- Structure:
- Chemical Name:
- 3-Hydroxypivalic acid
- CAS:
- 4835-90-9
- MF:
- C5H10O3
- Structure:
- Chemical Name:
- 4-Chlororesorcinol
- CAS:
- 95-88-5
- MF:
- C6H5ClO2
- Structure:
- Chemical Name:
- 1-(BROMOMETHYL)-4-(METHYLSULFONYL)BENZENE
- CAS:
- 53606-06-7
- MF:
- C8H9BrO2S
- Structure:
- Chemical Name:
- 4-FLUOROBENZENESULFINIC ACID SODIUM SALT
- CAS:
- 824-80-6
- MF:
- C6H6FNaO2S
- Structure:
- Chemical Name:
- 3-ACETYLBENZOIC ACID
- CAS:
- 586-42-5
- MF:
- C9H8O3
- Structure:
- Chemical Name:
- 1,1,2-Trimethoxyethane
- CAS:
- 24332-20-5
- MF:
- C5H12O3
- Structure:
- Chemical Name:
- 2-Amino-4-methylbenzoic acid
- CAS:
- 2305-36-4
- MF:
- C8H9NO2
- Structure:
- Chemical Name:
- (S)-(+)-Benzyl glycidyl ether
- CAS:
- 16495-13-9
- MF:
- C10H12O2
- Structure:
- Chemical Name:
- 2-Hydroxyethyl acrylate
- CAS:
- 818-61-1
- MF:
- C5H8O3
- Structure:
- Chemical Name:
- 3,5-Dichlorophenyl isocyanate
- CAS:
- 34893-92-0
- MF:
- C7H3Cl2NO
- Structure:
- Chemical Name:
- Propiolic Acid
- CAS:
- 471-25-0
- MF:
- C3H2O2
- Structure:
- Chemical Name:
- 4,4,4-Trifluorobutyric acid
- CAS:
- 406-93-9
- MF:
- C4H5F3O2
- Structure:
- Chemical Name:
- 4'-Hydroxyvalerophenone
- CAS:
- 2589-71-1
- MF:
- C11H14O2
- Structure:
- Chemical Name:
- 4-Bromo-3-nitroanisole
- CAS:
- 5344-78-5
- MF:
- C7H6BrNO3
- Structure:
- Chemical Name:
- 2-(2,2,2-Trifluoroethoxy)phenol
- CAS:
- 160968-99-0
- MF:
- C8H7F3O2
- Structure:
- Chemical Name:
- (R)-(-)-1,2-Propanediol
- CAS:
- 4254-14-2
- MF:
- C3H8O2