Esters Aromatic acids fatty acid Fatty alcohols Boric acid Cyanide / nitrile Aromatic ketones Aromatic aldehydes Halogenated aliphatic hydrocarbons aliphatic ketones Amide Ethers Aromatics Aromatic alcohol Phosphine ligand Phenols Thiol / thiol Silane Acyl halide Sulfonates / Sulfinates salts Cyanate ester / isocyanate Nitro compounds Imide Olefin (cyclic and acyclic) The polycyclic compound Hydrazine Amine salt (ammonium salt) Aliphatic aldehydes Bicyclic compound Oxime Tricyclic compound Alkanes Sulfonyl halide Phosphonate / phosphonate Phosphorus halide Alkyne Carboxylic anhydride Urea Phosphorus-containing compound Siloxane Azo, diazo compound Ionic Liquids Thiocyanate / isothiocyanate Borate Sulfonates / Sulfinates Selenium compounds Guanidine salt Borane Thiourea Thiolate tetrafluoroborate Thiol ester Polycyclic compound Crown ether Sulfone, sulfoxide compound Hydrazone Imide, amidine Polyamines Tosylate Epoxide Azide Hydroxylamine Cyclodextrin
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Organic reagents

Esters Aromatic acids fatty acid Fatty alcohols Boric acid Cyanide / nitrile Aromatic ketones Aromatic aldehydes Halogenated aliphatic hydrocarbons aliphatic ketones Amide Ethers Aromatics Aromatic alcohol Phosphine ligand Phenols Thiol / thiol Silane Acyl halide Sulfonates / Sulfinates salts Cyanate ester / isocyanate Nitro compounds Imide Olefin (cyclic and acyclic) The polycyclic compound Hydrazine Amine salt (ammonium salt) Aliphatic aldehydes Bicyclic compound Oxime Tricyclic compound Alkanes Sulfonyl halide Phosphonate / phosphonate Phosphorus halide Alkyne Carboxylic anhydride Urea Phosphorus-containing compound Siloxane Azo, diazo compound Ionic Liquids Thiocyanate / isothiocyanate Borate Sulfonates / Sulfinates Selenium compounds Guanidine salt Borane Thiourea Thiolate tetrafluoroborate Thiol ester Polycyclic compound Crown ether Sulfone, sulfoxide compound Hydrazone Imide, amidine Polyamines Tosylate Epoxide Azide Hydroxylamine Cyclodextrin
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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:
P-TOLUENESULFONIC ACID 1-BUTYN-3-YL ESTER
CAS:
53487-52-8
MF:
C11H12O3S
Structure:
Chemical Name:
3-CHLORO-4-FORMYLPHENYLBORONIC ACID
CAS:
1072952-53-4
MF:
C7H6BClO3
Structure:
Chemical Name:
4,4'-DIBROMO DIPHENYL SULFONE
CAS:
2050-48-8
MF:
C12H8Br2O2S
Structure:
Chemical Name:
11-AZIDO-3 6 9-TRIOXAUNDECAN-1-AMINE
CAS:
134179-38-7
MF:
C8H18N4O3
Structure:
Chemical Name:
2-(Diethylamino)ethyl methacrylate
CAS:
105-16-8
MF:
C10H19NO2
Structure:
Chemical Name:
Triphenyl(propyl)phosphonium
CAS:
15912-75-1
MF:
C21H22P+
Structure:
Chemical Name:
2-(2-Methoxyphenoxy)ethyl-4-methylbenzensulfonate
CAS:
137309-88-7
MF:
C16H18O5S
Structure:
Chemical Name:
2,4,6-Trimethylphenol
CAS:
527-60-6
MF:
C9H12O
Structure:
Chemical Name:
(S)-(+)-1,1'-BI-2-NAPHTHYL DI-P-TOLUENESULFONATE
CAS:
128575-35-9
MF:
C34H26O6S2
Structure:
Chemical Name:
3-METHYL-2,5-DIHYDROTHIOPHENE-1,1-DIOXIDE
CAS:
1193-10-8
MF:
C5H8O2S
Structure:
Chemical Name:
Dicyclohexano-18-crown-6
CAS:
16069-36-6
MF:
C20H36O6
Structure:
Chemical Name:
2,3-Diaminophenol
CAS:
59649-56-8
MF:
C6H8N2O
Structure:
Chemical Name:
9-Anthrracenecarbonitrile
CAS:
1210-12-4
MF:
C15H9N
Structure:
Chemical Name:
PHENYLSULFONYLACETIC ACID ETHYL ESTER
CAS:
7605-30-3
MF:
C10H12O4S
Structure:
Chemical Name:
N-BUTYL-4-METHYLPYRIDINIUM CHLORIDE
CAS:
112400-86-9
MF:
C10H16ClN
Structure:
Chemical Name:
2,3,6-TRICHLOROPHENOL
CAS:
933-75-5
MF:
C6H3Cl3O
Structure:
Chemical Name:
2,2,2-TRIFLUOROETHYL BUTYRATE
CAS:
371-27-7
MF:
C6H9F3O2
Structure:
Chemical Name:
4-(N-Ethyl-N-benzyl)amino benzoaldehyde-1,1-diphenylhydrazone
CAS:
96861-52-8
MF:
C28H27N3
Structure:
Chemical Name:
Poly(hexamethylenebiguanide)hydrochloride
CAS:
32289-58-0
MF:
C10H23N5
Structure:
Chemical Name:
3-Bromo-3,3-difluoropropene
CAS:
420-90-6
MF:
C3H3BrF2
Structure:
Chemical Name:
1-(2-Bromoethoxy)-4-nitrobenzene
CAS:
13288-06-7
MF:
C8H8BrNO3
Structure:
Chemical Name:
4-ETHYLTOLUENE
CAS:
622-96-8
MF:
C9H12
Structure:
Chemical Name:
BROMOHYDROQUINONE
CAS:
583-69-7
MF:
C6H5BrO2
Structure:
Chemical Name:
1-Hydroxy-1-cyclopropanecarboxylic acid
CAS:
17994-25-1
MF:
C4H6O3
Structure:
Chemical Name:
PYRIDINE-2-CARBOXALDEHYDE 2-QUINOLYLHYDRAZONE
CAS:
7385-99-1
MF:
C15H12N4
Structure:
Chemical Name:
METHYL 2,4-DICHLOROBENZOATE
CAS:
35112-28-8
MF:
C8H6Cl2O2
Structure:
Chemical Name:
1-Chloro-9,10-bis(phenylethynyl)anthracene
CAS:
41105-35-5
MF:
C30H17Cl
Structure:
Chemical Name:
3-METHYL-1-OCTYLIMIDAZOLIUM CHLORIDE
CAS:
64697-40-1
MF:
C12H23ClN2
Structure:
Chemical Name:
Ethyl 2-hydroxyethyl sulfide
CAS:
110-77-0
MF:
C4H10OS
Structure:
Chemical Name:
Sebacoyl chloride
CAS:
111-19-3
MF:
C10H16Cl2O2
Structure:
Chemical Name:
n-Propyl ether
CAS:
111-43-3
MF:
C6H14O
Structure:
Chemical Name:
4-Octyne
CAS:
1942-45-6
MF:
C8H14
Structure:
Chemical Name:
Iodoacetic acid
CAS:
64-69-7
MF:
C2H3IO2
Structure:
Chemical Name:
1-Decyne
CAS:
764-93-2
MF:
C10H18
Structure:
Chemical Name:
3-Methyl-1-pentyn-3-ol
CAS:
77-75-8
MF:
C6H10O
Structure:
Chemical Name:
Nitroxylol
CAS:
99-12-7
MF:
C8H9NO2
Structure:
Chemical Name:
DIPHENYL PHTHALATE
CAS:
84-62-8
MF:
C20H14O4
Structure:
Chemical Name:
2-METHOXYETHYL CHLOROFORMATE
CAS:
628-12-6
MF:
C4H7ClO3
Structure:
Chemical Name:
1,8-DICHLOROANTHRAQUINONE
CAS:
82-43-9
MF:
C14H6Cl2O2
Structure:
Chemical Name:
3-(Trifluoromethyl)phenylacetone
CAS:
21906-39-8
MF:
C10H9F3O
Structure:
Chemical Name:
4'-Heptyl-4-biphenylcarbonitrile
CAS:
41122-71-8
MF:
C20H23N
Structure:
Chemical Name:
2,2,2-TRIFLUOROETHYL FORMATE
CAS:
32042-38-9
MF:
C3H3F3O2
Structure:
Chemical Name:
TRIMETHYLSILYLMETHANETHIOL
CAS:
18165-76-9
MF:
C4H12SSi
Structure:
Chemical Name:
2,5-Dimethoxytoluene
CAS:
24599-58-4
MF:
C9H12O2
Structure:
Chemical Name:
4-Pentyloxy-[1,1'-biphenyl]-4'-carbonitrile
CAS:
52364-71-3
MF:
C18H19NO
Structure:
Chemical Name:
ALLYLTRIETHOXYSILANE
CAS:
2550-04-1
MF:
C9H20O3Si
Structure:
Chemical Name:
2-Diazo-1-naphthol-4-sulfonate
CAS:
64173-96-2
MF:
C10H7N2O4S-
Structure:
Chemical Name:
5-Nitrobenzothiazole-2-thiol
CAS:
58759-63-0
MF:
C7H4N2O2S2
Structure:
Chemical Name:
Isopentyl ether
CAS:
544-01-4
MF:
C10H22O
Structure:
Chemical Name:
(2-Chlorophenyl)phenyl-methanone
CAS:
5162-03-8
MF:
C13H9ClO
Structure:
Chemical Name:
3-METHOXYBENZOYL CHLORIDE
CAS:
1711-05-3
MF:
C8H7ClO2
Structure:
Chemical Name:
N-(Hydroxymethyl)benzamide
CAS:
6282-02-6
MF:
C8H9NO2
Structure:
Chemical Name:
(S)-(-)-2,2'-Dimethoxy-1,1'-binaphthalene
CAS:
75640-87-8
MF:
C22H18O2
Structure:
Chemical Name:
PLUMBAGIN
CAS:
481-42-5
MF:
C11H8O3
Structure:
Chemical Name:
THIODIGLYCOLIC ACID
CAS:
505-73-7
MF:
C4H6O4S2
Structure:
Chemical Name:
Tripropylene glycol
CAS:
24800-44-0
MF:
C9H20O4
Structure:
Chemical Name:
Diphenyldiethoxysilane
CAS:
2553-19-7
MF:
C16H20O2Si
Structure:
Chemical Name:
trans-3-Hexenoic acid
CAS:
1577-18-0
MF:
C6H10O2
Structure:
Chemical Name:
2-BROMOBENZAMIDE
CAS:
4001-73-4
MF:
C7H6BrNO
Structure:
Chemical Name:
3-FLUOROBENZHYDRAZIDE
CAS:
499-55-8
MF:
C7H7FN2O
Structure:
Chemical Name:
3-CYCLOPENTEN-1-ONE
CAS:
14320-37-7
MF:
C5H6O
Structure:
Chemical Name:
2-Bromo-4-nitroanisole
CAS:
5197-28-4
MF:
C7H6BrNO3
Structure:
Chemical Name:
7-Acetoxy-4-methylcoumarin
CAS:
2747-05-9
MF:
C12H10O4
Structure:
Chemical Name:
Tris(trimethylsilyl)phosphate
CAS:
10497-05-9
MF:
C9H27O4PSi3
Structure:
Chemical Name:
2,2'-Benzidinedisulfonic acid
CAS:
117-61-3
MF:
C12H12N2O6S2
Structure:
Chemical Name:
Tris(trimethylsilyl) borate
CAS:
4325-85-3
MF:
C9H27BO3Si3
Structure:
Chemical Name:
4-Bromo-2,6-di-tert-butylphenol
CAS:
1139-52-2
MF:
C14H21BrO
Structure:
Chemical Name:
2-(4-CARBOXYPHENYL)-1,3,2-DIOXABORINANE
CAS:
126747-13-5
MF:
C10H11BO4
Structure:
Chemical Name:
Thiobenzoic acid
CAS:
98-91-9
MF:
C7H6OS
Structure:
Chemical Name:
METHYL DIPHENYLACETATE
CAS:
3469-00-9
MF:
C15H14O2
Structure:
Chemical Name:
TRIMETHYLSILYL BROMOACETATE
CAS:
18291-80-0
MF:
C5H11BrO2Si
Structure:
Chemical Name:
3-NITROBENZAMIDINE HYDROCHLORIDE
CAS:
56406-50-9
MF:
C7H8ClN3O2
Structure:
Chemical Name:
2,5-DIMETHOXYBENZONITRILE
CAS:
5312-97-0
MF:
C9H9NO2
Structure:
Chemical Name:
4-AMIDINOBENZAMIDE HYDROCHLORIDE
CAS:
59855-11-7
MF:
C8H10ClN3O
Structure:
Chemical Name:
2-Methoxy-5-methylphenylboronic acid
CAS:
127972-00-3
MF:
C8H11BO3
Structure:
Chemical Name:
2-METHOXY-1-NAPHTHALDEHYDE
CAS:
5392-12-1
MF:
C12H10O2
Structure:
Chemical Name:
D-(-)-PANTOLACTONE
CAS:
599-04-2
MF:
C6H10O3
Structure:
Chemical Name:
BISPHENOL A DIGLYCIDYL ETHER RESIN
CAS:
1675-54-3
MF:
C21H24O4
Structure:
Chemical Name:
BIS[4-(2-HYDROXYETHOXY)-3,5-DIBROMOPHENYL] SULFONE
CAS:
53714-39-9
MF:
C16H14Br4O6S
Structure:
Chemical Name:
TRIHEXYLSILANE
CAS:
2929-52-4
MF:
C18H40Si
Structure:
Chemical Name:
1,3-DIETHOXYBENZENE
CAS:
2049-73-2
MF:
C10H14O2
Structure:
Chemical Name:
1-Ethoxy-2-propanol
CAS:
1569-02-4
MF:
C5H12O2
Structure:
Chemical Name:
3,5-Dichloroanisole
CAS:
33719-74-3
MF:
C7H6Cl2O
Structure:
Chemical Name:
2,6-DIMETHYL-4-(4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLAN-2-YL)PHENOL
CAS:
269410-25-5
MF:
C14H21BO3
Structure:
Chemical Name:
10-UNDECYN-1-OL
CAS:
2774-84-7
MF:
C11H20O
Structure:
Chemical Name:
LIGNOCERIC ACID METHYL ESTER
CAS:
2442-49-1
MF:
C25H50O2
Structure:
Chemical Name:
1-(5-CHLORO-2-METHYLPHENYL)-2-THIOUREA
CAS:
72806-61-2
MF:
C8H9ClN2S
Structure:
Chemical Name:
6-Nitrophthalide
CAS:
610-93-5
MF:
C8H5NO4
Structure:
Chemical Name:
3,3'-Thiodipropionic acid
CAS:
111-17-1
MF:
C6H10O4S
Structure:
Chemical Name:
1-Chlorocarbonyl-1-methylethyl acetate
CAS:
40635-66-3
MF:
C6H9ClO3
Structure:
Chemical Name:
2-Methylphenyl isocyanate
CAS:
614-68-6
MF:
C8H7NO
Structure:
Chemical Name:
4-ETHYLBENZENESULFONIC ACID SODIUM SALT
CAS:
14995-38-1
MF:
C8H9NaO3S
Structure:
Chemical Name:
3-ETHYLTOLUENE
CAS:
620-14-4
MF:
C9H12
Structure:
Chemical Name:
4'-Heptyloxy-4-cyanobiphenyl
CAS:
52364-72-4
MF:
C20H23NO
Structure:
Chemical Name:
1-Heptanethiol
CAS:
1639-09-4
MF:
C7H16S
Structure:
Chemical Name:
Indazole-4-boronic acid, hydrochloride
CAS:
1023595-17-6
MF:
C7H7BN2O2
Structure:
Chemical Name:
Trityl azide
CAS:
14309-25-2
MF:
C19H15N3
Structure:
Chemical Name:
Chlorodimethyloctadecylsilane
CAS:
18643-08-8
MF:
C20H43ClSi
Structure:
Chemical Name:
M-CRESYL ACETATE
CAS:
122-46-3
MF:
C9H10O2
Structure:
Chemical Name:
1,4-DIISOPROPYLBENZENE
CAS:
100-18-5
MF:
C12H18