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:
2,5-Dimethylphenylacetonitrile
CAS:
16213-85-7
MF:
C10H11N
Structure:
Chemical Name:
4-Methoxybenzoic acid
CAS:
100-09-4
MF:
C8H8O3
Structure:
Chemical Name:
o-Phthalaldehyde
CAS:
643-79-8
MF:
C8H6O2
Structure:
Chemical Name:
1,5-Pentanediol
CAS:
111-29-5
MF:
C5H12O2
Structure:
Chemical Name:
4-(Chloromethyl)tolunitrile
CAS:
874-86-2
MF:
C8H6ClN
Structure:
Chemical Name:
4-Hydroxy-3-methoxybenzylamine hydrochloride
CAS:
7149-10-2
MF:
C8H12ClNO2
Structure:
Chemical Name:
2-BIPHENYLBORONIC ACID
CAS:
4688-76-0
MF:
C12H11BO2
Structure:
Chemical Name:
Triclosan
CAS:
3380-34-5
MF:
C12H7Cl3O2
Structure:
Chemical Name:
2-Bromobenzaldehyde
CAS:
6630-33-7
MF:
C7H5BrO
Structure:
Chemical Name:
Ethyl bromoacetate
CAS:
105-36-2
MF:
C4H7BrO2
Structure:
Chemical Name:
2-Ethoxyethanol
CAS:
110-80-5
MF:
C4H10O2
Structure:
Chemical Name:
Chloromethyltrimethylsilane
CAS:
2344-80-1
MF:
C4H11ClSi
Structure:
Chemical Name:
Diiodomethane
CAS:
75-11-6
MF:
CH2I2
Structure:
Chemical Name:
1,1-Cyclohexanediacetic acid
CAS:
4355-11-7
MF:
C10H16O4
Structure:
Chemical Name:
3-bromo-5-methylaniline
CAS:
74586-53-1
MF:
C7H8BrN
Structure:
Chemical Name:
4-(N,N-Diphenylamino)benzaldehyde
CAS:
4181-05-9
MF:
C19H15NO
Structure:
Chemical Name:
Carbon tetrafluoride
CAS:
75-73-0
MF:
CF4
Structure:
Chemical Name:
Guanidine hydrochloride
CAS:
50-01-1
MF:
CH5N3.ClH
Structure:
Chemical Name:
3-Aminocarbonylphenylboronic acid
CAS:
351422-73-6
MF:
C7H8BNO3
Structure:
Chemical Name:
3,5-Dibromobenzoic acid
CAS:
618-58-6
MF:
C7H4Br2O2
Structure:
Chemical Name:
4-(Trifluoromethoxy)benzoic acid
CAS:
330-12-1
MF:
C8H5F3O3
Structure:
Chemical Name:
N-Phenyldiethanolamine
CAS:
120-07-0
MF:
C10H15NO2
Structure:
Chemical Name:
2-Bromobenzonitrile
CAS:
2042-37-7
MF:
C7H4BrN
Structure:
Chemical Name:
2,2,2-TRIFLUOROETHYL METHANESULFONATE
CAS:
25236-64-0
MF:
C3H5F3O3S
Structure:
Chemical Name:
Ethyl 2-oxocyclohexanecarboxylate
CAS:
1655-07-8
MF:
C9H14O3
Structure:
Chemical Name:
3-ETHOXYPHENYLBORONIC ACID
CAS:
90555-66-1
MF:
C8H11BO3
Structure:
Chemical Name:
4-Iodoanisole
CAS:
696-62-8
MF:
C7H7IO
Structure:
Chemical Name:
2,6-Dichlorophenol
CAS:
87-65-0
MF:
C6H4Cl2O
Structure:
Chemical Name:
2,3-Dimethoxybenzoic acid
CAS:
1521-38-6
MF:
C9H10O4
Structure:
Chemical Name:
PYRAZINE-2-CARBOXAMIDINE HYDROCHLORIDE
CAS:
138588-41-7
MF:
C5H7ClN4
Structure:
Chemical Name:
1-Benzhydrylazetidine-3-carboxylic acid
CAS:
36476-87-6
MF:
C17H17NO2
Structure:
Chemical Name:
2-Chlorobenzoic acid
CAS:
118-91-2
MF:
C7H5ClO2
Structure:
Chemical Name:
4-Acetylbenzonitrile
CAS:
1443-80-7
MF:
C9H7NO
Structure:
Chemical Name:
1-Naphthoic acid
CAS:
86-55-5
MF:
C11H8O2
Structure:
Chemical Name:
Hydroxytyrosol
CAS:
10597-60-1
MF:
C8H10O3
Structure:
Chemical Name:
Diethyl fluoromalonate
CAS:
685-88-1
MF:
C7H11FO4
Structure:
Chemical Name:
2-Chlorobenzonitrile
CAS:
873-32-5
MF:
C7H4ClN
Structure:
Chemical Name:
4-Bromoveratrole
CAS:
2859-78-1
MF:
C8H9BrO2
Structure:
Chemical Name:
3-Bromo-4-methylbenzoic acid
CAS:
7697-26-9
MF:
C8H7BrO2
Structure:
Chemical Name:
4-Dibenzothiopheneboronic acid
CAS:
108847-20-7
MF:
C12H9BO2S
Structure:
Chemical Name:
5-(4-METHYLPHENYL)-1,3,4-OXADIAZOLE-2-THIOL
CAS:
3004-42-0
MF:
C8H6N2OS
Structure:
Chemical Name:
Methyl dimethoxyacetate
CAS:
89-91-8
MF:
C5H10O4
Structure:
Chemical Name:
3-Formylphenylboronic acid
CAS:
87199-16-4
MF:
C7H7BO3
Structure:
Chemical Name:
Methyl 4-(bromomethyl)benzoate
CAS:
2417-72-3
MF:
C9H9BrO2
Structure:
Chemical Name:
1-(2-FLUOROPHENYL)-2-THIOUREA
CAS:
656-32-6
MF:
C7H7FN2S
Structure:
Chemical Name:
2'-Chloroacetophenone
CAS:
2142-68-9
MF:
C8H7ClO
Structure:
Chemical Name:
(TRIETHYLSILYL)ACETYLENE
CAS:
1777-03-3
MF:
C8H16Si
Structure:
Chemical Name:
2-Fluoro-3-pyridylboronic acid
CAS:
174669-73-9
MF:
C5H5BFNO2
Structure:
Chemical Name:
trans-1,4-Diaminocyclohexane
CAS:
2615-25-0
MF:
C6H14N2
Structure:
Chemical Name:
3-BROMOPHENETHYL ALCOHOL
CAS:
28229-69-8
MF:
C8H9BrO
Structure:
Chemical Name:
2-Indanone
CAS:
615-13-4
MF:
C9H8O
Structure:
Chemical Name:
Dimethyl fumarate
CAS:
624-49-7
MF:
C6H8O4
Structure:
Chemical Name:
Phloroglucinol dihydrate
CAS:
6099-90-7
MF:
C6H10O5
Structure:
Chemical Name:
3,5-Dimethoxyphenylboronic acid
CAS:
192182-54-0
MF:
C8H11BO4
Structure:
Chemical Name:
4-Trifluoromethylsalicylic acid
CAS:
328-90-5
MF:
C8H5F3O3
Structure:
Chemical Name:
2-Ethylhexyl bromide
CAS:
18908-66-2
MF:
C8H17Br
Structure:
Chemical Name:
Squaric acid
CAS:
2892-51-5
MF:
C4H2O4
Structure:
Chemical Name:
Sodium 4-hydroxybenzenesulfonate
CAS:
825-90-1
MF:
C6H7NaO4S
Structure:
Chemical Name:
3-Cyanophenol
CAS:
873-62-1
MF:
C7H5NO
Structure:
Chemical Name:
3,3-Dimethylacrylic acid
CAS:
541-47-9
MF:
C5H8O2
Structure:
Chemical Name:
2-Thiopheneboronic acid
CAS:
6165-68-0
MF:
C4H5BO2S
Structure:
Chemical Name:
2-Fluoro-4-nitroanisole
CAS:
455-93-6
MF:
C7H6FNO3
Structure:
Chemical Name:
ETHYL 1-METHYL-3-(TRIFLUOROMETHYL)-1H-PYRAZOLE-4-CARBOXYLATE
CAS:
111493-74-4
MF:
C8H9F3N2O2
Structure:
Chemical Name:
2-Hydroxy-5-methoxybenzaldehyde
CAS:
672-13-9
MF:
C8H8O3
Structure:
Chemical Name:
o-Carborane
CAS:
16872-09-6
MF:
C2B10
Structure:
Chemical Name:
4-Iodophenetole
CAS:
699-08-1
MF:
C8H9IO
Structure:
Chemical Name:
Phthalic acid
CAS:
88-99-3
MF:
C8H6O4
Structure:
Chemical Name:
3,4-Dichlorophenylacetonitrile
CAS:
3218-49-3
MF:
C8H5Cl2N
Structure:
Chemical Name:
4-Chloro-3-(trifluoromethyl)phenylboronic acid
CAS:
176976-42-4
MF:
C7H5BClF3O2
Structure:
Chemical Name:
2-Bromoacetophenone
CAS:
70-11-1
MF:
C8H7BrO
Structure:
Chemical Name:
Butyryl chloride
CAS:
141-75-3
MF:
C4H7ClO
Structure:
Chemical Name:
N-Ethylcarbazole
CAS:
86-28-2
MF:
C14H13N
Structure:
Chemical Name:
Methyl 3-oxovalerate
CAS:
30414-53-0
MF:
C6H10O3
Structure:
Chemical Name:
Benzoylacetonitrile
CAS:
614-16-4
MF:
C9H7NO
Structure:
Chemical Name:
3-BROMO-5-IODOBENZOIC ACID
CAS:
188815-32-9
MF:
C7H4BrIO2
Structure:
Chemical Name:
2-BROMO-5-METHYLBENZOIC ACID
CAS:
6967-82-4
MF:
C8H7BrO2
Structure:
Chemical Name:
2,5-Dimethoxybenzaldehyde
CAS:
93-02-7
MF:
C9H10O3
Structure:
Chemical Name:
Ethyl trifluoroacetate
CAS:
383-63-1
MF:
C4H5F3O2
Structure:
Chemical Name:
Trimesic acid
CAS:
554-95-0
MF:
C9H6O6
Structure:
Chemical Name:
2-Formylbenzeneboronic acid
CAS:
40138-16-7
MF:
C7H7BO3
Structure:
Chemical Name:
3-Fluoro-4-methoxybenzeneboronic acid
CAS:
149507-26-6
MF:
C7H8BFO3
Structure:
Chemical Name:
3-Fluorobenzoyl chloride
CAS:
1711-07-5
MF:
C7H4ClFO
Structure:
Chemical Name:
Maleimide
CAS:
541-59-3
MF:
C4H3NO2
Structure:
Chemical Name:
9-phenanthrenylboronic acid
CAS:
68572-87-2
MF:
C14H11BO2
Structure:
Chemical Name:
4-Trifluoromethylphenol
CAS:
402-45-9
MF:
C7H5F3O
Structure:
Chemical Name:
Tetrabutylammonium hydroxide
CAS:
2052-49-5
MF:
C16H37NO
Structure:
Chemical Name:
2,2'-Dichlorodiethyl ether
CAS:
111-44-4
MF:
C4H8Cl2O
Structure:
Chemical Name:
4-(Trifluoromethyl)benzaldehyde
CAS:
455-19-6
MF:
C8H5F3O
Structure:
Chemical Name:
4-Carbamoylphenylboronic acid
CAS:
123088-59-5
MF:
C7H8BNO3
Structure:
Chemical Name:
Diethyl methylmalonate
CAS:
609-08-5
MF:
C8H14O4
Structure:
Chemical Name:
2-Aminoacetophenone hydrochloride
CAS:
5468-37-1
MF:
C8H10ClNO
Structure:
Chemical Name:
3,4,5-Trimethoxyphenylacetic acid
CAS:
951-82-6
MF:
C11H14O5
Structure:
Chemical Name:
ETHYLTHIOUREA
CAS:
625-53-6
MF:
C3H8N2S
Structure:
Chemical Name:
4-Fluoroacetophenone
CAS:
403-42-9
MF:
C8H7FO
Structure:
Chemical Name:
1-Naphthaldehyde
CAS:
66-77-3
MF:
C11H8O
Structure:
Chemical Name:
2,3-Dimethoxybenzaldehyde
CAS:
86-51-1
MF:
C9H10O3
Structure:
Chemical Name:
mono-Methyl terephthalate
CAS:
1679-64-7
MF:
C9H8O4
Structure:
Chemical Name:
Diphenic acid
CAS:
482-05-3
MF:
C14H10O4
Structure:
Chemical Name:
n-Butylboronic acid
CAS:
4426-47-5
MF:
C4H11BO2
Structure:
Chemical Name:
Diethyl azodicarboxylate
CAS:
1972-28-7
MF:
C6H10N2O4