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:
3-Cyanobenzaldehyde
CAS:
24964-64-5
MF:
C8H5NO
Structure:
Chemical Name:
Pivaloylacetonitrile
CAS:
59997-51-2
MF:
C7H11NO
Structure:
Chemical Name:
Bis(2-chloroethyl)amine hydrochloride
CAS:
821-48-7
MF:
C4H10Cl3N
Structure:
Chemical Name:
5-Chloro-2-methylaniline
CAS:
95-79-4
MF:
C7H8ClN
Structure:
Chemical Name:
3-Iodobenzoic acid
CAS:
618-51-9
MF:
C7H5IO2
Structure:
Chemical Name:
4-HYDROXY-6-(TRIFLUOROMETHYL)PYRIMIDINE-2-THIOL
CAS:
368-54-7
MF:
C5H3F3N2OS
Structure:
Chemical Name:
Syringaldehyde
CAS:
134-96-3
MF:
C9H10O4
Structure:
Chemical Name:
4-Bromophenylacetic acid
CAS:
1878-68-8
MF:
C8H7BrO2
Structure:
Chemical Name:
Dibenzothiophene
CAS:
132-65-0
MF:
C12H8S
Structure:
Chemical Name:
Lanthanum trifluoromethanesulfonate
CAS:
52093-26-2
MF:
C3F9LaO9S3
Structure:
Chemical Name:
3-Cyclohexene-1-carboxaldehyde
CAS:
100-50-5
MF:
C7H10O
Structure:
Chemical Name:
(S)-(+)-Mandelic acid
CAS:
17199-29-0
MF:
C8H8O3
Structure:
Chemical Name:
3-Butyn-1-ol
CAS:
927-74-2
MF:
C4H6O
Structure:
Chemical Name:
3-Bromobenzonitrile
CAS:
6952-59-6
MF:
C7H4BrN
Structure:
Chemical Name:
1,6-Dibromohexane
CAS:
629-03-8
MF:
C6H12Br2
Structure:
Chemical Name:
4-Nitrobenzyl chloroformate
CAS:
4457-32-3
MF:
C8H6ClNO4
Structure:
Chemical Name:
3,4-Dihydroxyphenylacetic acid
CAS:
102-32-9
MF:
C8H8O4
Structure:
Chemical Name:
N,O-Bis(trimethylsilyl)acetamide
CAS:
10416-59-8
MF:
C8H21NOSi2
Structure:
Chemical Name:
3'-Chloropropiophenone
CAS:
34841-35-5
MF:
C9H9ClO
Structure:
Chemical Name:
Benzyltributylammonium chloride
CAS:
23616-79-7
MF:
C19H34ClN
Structure:
Chemical Name:
Trifluoromethanesulfonic acid
CAS:
1493-13-6
MF:
CHF3O3S
Structure:
Chemical Name:
2-Chlorophenylboronic acid
CAS:
3900-89-8
MF:
C6H6BClO2
Structure:
Chemical Name:
4-Butylphenylboronic acid
CAS:
145240-28-4
MF:
C10H15BO2
Structure:
Chemical Name:
Trichloroethanol
CAS:
115-20-8
MF:
C2H3Cl3O
Structure:
Chemical Name:
Chloroacetaldehyde diethyl acetal
CAS:
621-62-5
MF:
C6H13ClO2
Structure:
Chemical Name:
2-(CHLOROMETHYL)-1,3-BENZOXAZOLE
CAS:
41014-43-1
MF:
C8H6ClNO
Structure:
Chemical Name:
3-Cyclopentene-1-carboxylic acid
CAS:
7686-77-3
MF:
C6H8O2
Structure:
Chemical Name:
3-(BROMOMETHYL)BENZALDEHYDE
CAS:
82072-23-9
MF:
C8H7BrO
Structure:
Chemical Name:
4-METHYLBENZYL MERCAPTAN
CAS:
4498-99-1
MF:
C8H10S
Structure:
Chemical Name:
Dimethyl isophthalate
CAS:
1459-93-4
MF:
C10H10O4
Structure:
Chemical Name:
Trithiocyanuric acid
CAS:
638-16-4
MF:
C3H3N3S3
Structure:
Chemical Name:
4-Methoxytriphenylmethyl chloride
CAS:
14470-28-1
MF:
C20H17ClO
Structure:
Chemical Name:
Acetone thiosemicarbazone
CAS:
1752-30-3
MF:
C4H9N3S
Structure:
Chemical Name:
Ethyl (trimethylsilyl)acetate
CAS:
4071-88-9
MF:
C7H16O2Si
Structure:
Chemical Name:
Triethoxyoctylsilane
CAS:
2943-75-1
MF:
C14H32O3Si
Structure:
Chemical Name:
1,4-Dicyanobenzene
CAS:
623-26-7
MF:
C8H4N2
Structure:
Chemical Name:
3'-(Trifluoromethyl)acetophenone
CAS:
349-76-8
MF:
C9H7F3O
Structure:
Chemical Name:
3-(Trifluoromethoxy)benzoic acid
CAS:
1014-81-9
MF:
C8H5F3O3
Structure:
Chemical Name:
1,10-DIAMINODECANE
CAS:
646-25-3
MF:
C10H24N2
Structure:
Chemical Name:
2,5-Dibromonitrobenzene
CAS:
3460-18-2
MF:
C6H3Br2NO2
Structure:
Chemical Name:
Ethyl 4-dimethylaminobenzoate
CAS:
10287-53-3
MF:
C11H15NO2
Structure:
Chemical Name:
2-Methoxypyridine-3-boronic acid
CAS:
163105-90-6
MF:
C6H8BNO3
Structure:
Chemical Name:
4-Trifluoromethylphenylboronic acid
CAS:
128796-39-4
MF:
C7H6BF3O2
Structure:
Chemical Name:
3,4-Dimethoxyphenylboronic acid
CAS:
122775-35-3
MF:
C8H11BO4
Structure:
Chemical Name:
2-Methoxycarbonylphenylboronic acid
CAS:
374538-03-1
MF:
C8H9BO4
Structure:
Chemical Name:
3,4-Dimethoxybenzyl alcohol
CAS:
93-03-8
MF:
C9H12O3
Structure:
Chemical Name:
1-Tetralone
CAS:
529-34-0
MF:
C10H10O
Structure:
Chemical Name:
4-Bromo-2-hydroxybenzaldehyde
CAS:
22532-62-3
MF:
C7H5BrO2
Structure:
Chemical Name:
1-NONANESULFONIC ACID SODIUM SALT
CAS:
35192-74-6
MF:
C9H19NaO3S
Structure:
Chemical Name:
4-(Trifluoromethyl)benzoic acid
CAS:
455-24-3
MF:
C8H5F3O2
Structure:
Chemical Name:
4-Fluoro-3-nitrobenzoic acid
CAS:
453-71-4
MF:
C7H4FNO4
Structure:
Chemical Name:
3-Bromobenzoyl chloride
CAS:
1711-09-7
MF:
C7H4BrClO
Structure:
Chemical Name:
2-BROMOPHENETHYLALCOHOL
CAS:
1074-16-4
MF:
C8H9BrO
Structure:
Chemical Name:
Methoxyacetic acid
CAS:
625-45-6
MF:
C3H6O3
Structure:
Chemical Name:
5-Bromovaleric acid
CAS:
2067-33-6
MF:
C5H9BrO2
Structure:
Chemical Name:
1-PHENYL-2-THIOUREA
CAS:
103-85-5
MF:
C7H8N2S
Structure:
Chemical Name:
2-Bromoanisole
CAS:
578-57-4
MF:
C7H7BrO
Structure:
Chemical Name:
1,8-Octanediol
CAS:
629-41-4
MF:
C8H18O2
Structure:
Chemical Name:
2,3-Dichlorophenylboronic acid
CAS:
151169-74-3
MF:
C6H5BCl2O2
Structure:
Chemical Name:
Cyclopropanesulfonyl chloride
CAS:
139631-62-2
MF:
C3H5ClO2S
Structure:
Chemical Name:
3-Amino-2-methylbenzoic acid
CAS:
52130-17-3
MF:
C8H9NO2
Structure:
Chemical Name:
2-Methylthiophenylboronic acid
CAS:
168618-42-6
MF:
C7H9BO2S
Structure:
Chemical Name:
Di-tert-Butyl azodicarboxylate
CAS:
870-50-8
MF:
C10H18N2O4
Structure:
Chemical Name:
2,5-Dichlorobenzoic acid
CAS:
50-79-3
MF:
C7H4Cl2O2
Structure:
Chemical Name:
2-(4-Bromophenyl)-2-methylpropanenitrile
CAS:
101184-73-0
MF:
C10H10BrN
Structure:
Chemical Name:
4''-CHLORO-2''-FLUOROACETOPHENONE
CAS:
175711-83-8
MF:
C8H6ClFO
Structure:
Chemical Name:
2-Hydroxy-1-naphthaldehyde
CAS:
708-06-5
MF:
C11H8O2
Structure:
Chemical Name:
6-Methoxy-2-naphthaldehyde
CAS:
3453-33-6
MF:
C12H10O2
Structure:
Chemical Name:
1,4-Cyclohexanedione
CAS:
637-88-7
MF:
C6H8O2
Structure:
Chemical Name:
N-Chlorosuccinimide
CAS:
128-09-6
MF:
C4H4ClNO2
Structure:
Chemical Name:
4-Bromo-3-methoxybenzonitrile
CAS:
120315-65-3
MF:
C8H6BrNO
Structure:
Chemical Name:
2-Thiopheneacetic acid
CAS:
1918-77-0
MF:
C6H6O2S
Structure:
Chemical Name:
Bromoacetaldehyde dimethyl acetal
CAS:
7252-83-7
MF:
C4H9BrO2
Structure:
Chemical Name:
2-Carboxybenzaldehyde
CAS:
119-67-5
MF:
C8H6O3
Structure:
Chemical Name:
2,5-Dihydroxybenzaldehyde
CAS:
1194-98-5
MF:
C7H6O3
Structure:
Chemical Name:
Tyramine
CAS:
51-67-2
MF:
C8H11NO
Structure:
Chemical Name:
Trimethoxyphenylsilane
CAS:
2996-92-1
MF:
C9H14O3Si
Structure:
Chemical Name:
Piperonylic acid
CAS:
94-53-1
MF:
C8H6O4
Structure:
Chemical Name:
Tetrafluoro-1-propanol
CAS:
76-37-9
MF:
C3H4F4O
Structure:
Chemical Name:
Isobutyl chloroformate
CAS:
543-27-1
MF:
C5H9ClO2
Structure:
Chemical Name:
Methyl bromoacetate
CAS:
96-32-2
MF:
C3H5BrO2
Structure:
Chemical Name:
Dibenzoylmethane
CAS:
120-46-7
MF:
C15H12O2
Structure:
Chemical Name:
3-Bromopropionic acid
CAS:
590-92-1
MF:
C3H5BrO2
Structure:
Chemical Name:
2,3-Dimethylmaleic anhydride
CAS:
766-39-2
MF:
C6H6O3
Structure:
Chemical Name:
Homovanillic acid
CAS:
306-08-1
MF:
C9H10O4
Structure:
Chemical Name:
4'-Hydroxyacetophenone
CAS:
99-93-4
MF:
C8H8O2
Structure:
Chemical Name:
3-Chlorobenzoic acid
CAS:
535-80-8
MF:
C7H5ClO2
Structure:
Chemical Name:
Triisopropylsilane
CAS:
6485-79-6
MF:
C9H22Si
Structure:
Chemical Name:
Ethyl isocyanoacetate
CAS:
2999-46-4
MF:
C5H7NO2
Structure:
Chemical Name:
2-Nitro-4-trifluoromethylbenzoic acid
CAS:
320-94-5
MF:
C8H4F3NO4
Structure:
Chemical Name:
Methyl methoxyacetate
CAS:
6290-49-9
MF:
C4H8O3
Structure:
Chemical Name:
Pyridine-4-boronic acid
CAS:
1692-15-5
MF:
C5H6BNO2
Structure:
Chemical Name:
Malic acid
CAS:
6915-15-7
MF:
C4H6O5
Structure:
Chemical Name:
3-Chlorobenzoyl chloride
CAS:
618-46-2
MF:
C7H4Cl2O
Structure:
Chemical Name:
3-(Decyldimethylazaniumyl)propane-1-sulfonate
CAS:
15163-36-7
MF:
C15H33NO3S
Structure:
Chemical Name:
Fluoromethyl phenyl sulfone
CAS:
20808-12-2
MF:
C7H7FO2S
Structure:
Chemical Name:
Cyclobutanone
CAS:
1191-95-3
MF:
C4H6O
Structure:
Chemical Name:
2-Benzylacrylic acid
CAS:
5669-19-2
MF:
C10H10O2
Structure:
Chemical Name:
Phthaloyl dichloride
CAS:
88-95-9
MF:
C8H4Cl2O2
Structure:
Chemical Name:
tert-Butyl N-hydroxycarbamate
CAS:
36016-38-3
MF:
C5H11NO3