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:
3,5-Dichloroanthranilic acid
CAS:
2789-92-6
MF:
C7H5Cl2NO2
Structure:
Chemical Name:
1,4-Diacetylbenzene
CAS:
1009-61-6
MF:
C10H10O2
Structure:
Chemical Name:
Methyl pivaloylacetate
CAS:
55107-14-7
MF:
C8H14O3
Structure:
Chemical Name:
3-Methylphenethyl alcohol
CAS:
1875-89-4
MF:
C9H12O
Structure:
Chemical Name:
BIS(DIMETHYLAMINO)PHOSPHORYL CHLORIDE
CAS:
1605-65-8
MF:
C4H12ClN2OP
Structure:
Chemical Name:
1,8-Dihydroxy-4,5-dinitroanthraquinone
CAS:
81-55-0
MF:
C14H6N2O8
Structure:
Chemical Name:
ELAIDIC ACID
CAS:
112-79-8
MF:
C18H34O2
Structure:
Chemical Name:
HEXAHYDRO-2,4,6-TRIMETHYL-1,3,5-TRIAZINE TRIHYDRATE
CAS:
58052-80-5
MF:
C6H17N3O
Structure:
Chemical Name:
Dimethyl acetylsuccinate
CAS:
10420-33-4
MF:
C8H12O5
Structure:
Chemical Name:
Diphenyliodonium hexafluorophosphate
CAS:
58109-40-3
MF:
C12H10F6IP
Structure:
Chemical Name:
1-Butyl-3-methylimidazolium trifluoromethansulfonate
CAS:
174899-66-2
MF:
C9H15F3N2O3S
Structure:
Chemical Name:
2-CHLOROETHYL ISOTHIOCYANATE
CAS:
6099-88-3
MF:
C3H4ClNS
Structure:
Chemical Name:
TRIS(4-FORMYLPHENYL)AMINE
CAS:
119001-43-3
MF:
C21H15NO3
Structure:
Chemical Name:
1-PYRENEBUTYRIC ACID
CAS:
3443-45-6
MF:
C20H16O2
Structure:
Chemical Name:
3-METHOXYPHENYL ISOCYANATE
CAS:
18908-07-1
MF:
C8H7NO2
Structure:
Chemical Name:
2,4,6-Trimethylbenzyl alcohol
CAS:
4170-90-5
MF:
C10H14O
Structure:
Chemical Name:
Fluoroacetonitrile
CAS:
503-20-8
MF:
C2H2FN
Structure:
Chemical Name:
1-DECYL-2-THIOUREA
CAS:
24827-74-5
MF:
C11H24N2S
Structure:
Chemical Name:
4-(2-THIENYL)BUTYRIC ACID
CAS:
4653-11-6
MF:
C8H10O2S
Structure:
Chemical Name:
1-BUTYL-2,3-DIMETHYLIMIDAZOLIUM TETRAFLUOROBORATE
CAS:
402846-78-0
MF:
C9H17BF4N2
Structure:
Chemical Name:
3-Bromopropionyl chloride
CAS:
15486-96-1
MF:
C3H4BrClO
Structure:
Chemical Name:
MMTS
CAS:
33577-16-1
MF:
C3H8OS2
Structure:
Chemical Name:
4,5-DICHLOROPHTHALIC ANHYDRIDE
CAS:
942-06-3
MF:
C8H2Cl2O3
Structure:
Chemical Name:
4-Iodophenylacetic acid
CAS:
1798-06-7
MF:
C8H7IO2
Structure:
Chemical Name:
4-(Trifluoromethylthio)benzoyl chloride
CAS:
330-14-3
MF:
C8H4ClF3OS
Structure:
Chemical Name:
4,5-DIMETHYL-4H-(1,2,4)TRIOZOLE-3-THIOL
CAS:
38942-50-6
MF:
C4H7N3S
Structure:
Chemical Name:
Methyl 3-cyclopentenecarboxylate
CAS:
58101-60-3
MF:
C7H10O2
Structure:
Chemical Name:
Methyl 4-amino-3-bromobenzoate
CAS:
106896-49-5
MF:
C8H8BrNO2
Structure:
Chemical Name:
Ethyl 2-bromovalerate
CAS:
615-83-8
MF:
C7H13BrO2
Structure:
Chemical Name:
4-Hydroxybenzamidine hydrochloride
CAS:
38148-63-9
MF:
C7H9ClN2O
Structure:
Chemical Name:
3-CHLORO-3-METHYL-1-BUTYNE
CAS:
1111-97-3
MF:
C5H7Cl
Structure:
Chemical Name:
1,2-BIS(DIMETHYLPHOSPHINO)ETHANE
CAS:
23936-60-9
MF:
C6H16P2
Structure:
Chemical Name:
BENZYL L-LACTATE
CAS:
56777-24-3
MF:
C10H12O3
Structure:
Chemical Name:
1-Iodododecane
CAS:
4292-19-7
MF:
C12H25I
Structure:
Chemical Name:
2,2,2-TRIFLUOROETHYL TRIFLUOROACETATE
CAS:
407-38-5
MF:
C4H2F6O2
Structure:
Chemical Name:
2-BROMOPHENYL ISOCYANATE
CAS:
1592-00-3
MF:
C7H4BrNO
Structure:
Chemical Name:
Glycerol formal
CAS:
4740-78-7
MF:
C4H8O3
Structure:
Chemical Name:
2-Chloro-5-nitrophenylboronic acid
CAS:
867333-29-7
MF:
C6H5BClNO4
Structure:
Chemical Name:
3-Methylphenyl isothiocyanate
CAS:
621-30-7
MF:
C8H7NS
Structure:
Chemical Name:
2,6-DICHLOROTHIOPHENOL
CAS:
24966-39-0
MF:
C6H4Cl2S
Structure:
Chemical Name:
LAURIC ANHYDRIDE
CAS:
645-66-9
MF:
C24H46O3
Structure:
Chemical Name:
3-Fluoro-4-nitroanisole
CAS:
446-38-8
MF:
C7H6FNO3
Structure:
Chemical Name:
2-CHLORO-4-(TRIFLUOROMETHYL)BENZENESULFONYL CHLORIDE
CAS:
175205-54-6
MF:
C7H3Cl2F3O2S
Structure:
Chemical Name:
7-BROMO-3-HYDROXY-NAPHTHALENE-2-CARBOXYLIC ACID
CAS:
1779-11-9
MF:
C11H7BrO3
Structure:
Chemical Name:
N-ACETYLPHTHALIMIDE
CAS:
1971-49-9
MF:
C10H7NO3
Structure:
Chemical Name:
4-Amino-2-methylphenol
CAS:
2835-96-3
MF:
C7H9NO
Structure:
Chemical Name:
2,3-Dichlorophenylhydrazine hydrochloride
CAS:
21938-47-6
MF:
C6H7Cl3N2
Structure:
Chemical Name:
2,2'-DIAMINODIPHENYL SULFIDE
CAS:
5873-51-8
MF:
C12H12N2S
Structure:
Chemical Name:
1-(3-METHOXYBENZYL)-2-THIOUREA
CAS:
90556-79-9
MF:
C9H12N2OS
Structure:
Chemical Name:
2,4-DIMETHYLANILINE-5-SULFONIC ACID SODIUM SALT
CAS:
64501-84-4
MF:
C8H10NNaO3S
Structure:
Chemical Name:
4'-CYCLOHEXYLACETOPHENONE
CAS:
18594-05-3
MF:
C14H18O
Structure:
Chemical Name:
5,6-DICHLOROBENZIMIDAZOLE-2-THIOL
CAS:
19462-98-7
MF:
C7H4Cl2N2S
Structure:
Chemical Name:
1-Ethyl-3-methylimidazolium trifluoromethanesulfonate
CAS:
145022-44-2
MF:
C7H11F3N2O3S
Structure:
Chemical Name:
Diethyl dibutylmalonate
CAS:
596-75-8
MF:
C15H28O4
Structure:
Chemical Name:
RAC-2-(DI-T-BUTYLPHOSPHINO)-1,1'-BINAPHTHYL
CAS:
255836-67-0
MF:
C28H31P
Structure:
Chemical Name:
4-(Methylthio)benzyl alcohol
CAS:
3446-90-0
MF:
C8H10OS
Structure:
Chemical Name:
4-(CYANOMETHYL)BENZENEBORONIC ACID
CAS:
91983-26-5
MF:
C8H8BNO2
Structure:
Chemical Name:
METHYL LINOLEATE
CAS:
112-63-0
MF:
C19H34O2
Structure:
Chemical Name:
2,6-Dibromo-4-nitrophenol
CAS:
99-28-5
MF:
C6H3Br2NO3
Structure:
Chemical Name:
1-Nitropyrene
CAS:
5522-43-0
MF:
C16H9NO2
Structure:
Chemical Name:
Fumaronitrile
CAS:
764-42-1
MF:
C4H2N2
Structure:
Chemical Name:
P-TOLUENESULFONIC ACID NICKEL SALT
CAS:
6944-05-4
MF:
C7H8NiO3S
Structure:
Chemical Name:
2-Methoxy-5-formylphenylboronic acid
CAS:
127972-02-5
MF:
C8H9BO4
Structure:
Chemical Name:
Ethyl 4-hydroxyphenylacetate
CAS:
17138-28-2
MF:
C10H12O3
Structure:
Chemical Name:
PURPURIN
CAS:
81-54-9
MF:
C14H8O5
Structure:
Chemical Name:
3-Nitro-5-(trifluoromethyl)phenol
CAS:
349-57-5
MF:
C7H4F3NO3
Structure:
Chemical Name:
Ethyl phenyl sulfone
CAS:
599-70-2
MF:
C8H10O2S
Structure:
Chemical Name:
4,4'-Thiobis(6-tert-butyl-m-cresol)
CAS:
96-69-5
MF:
C22H30O2S
Structure:
Chemical Name:
3-Anilinopropionitrile
CAS:
1075-76-9
MF:
C9H10N2
Structure:
Chemical Name:
1,1,3,3-Tetraethylurea
CAS:
1187-03-7
MF:
C9H20N2O
Structure:
Chemical Name:
trans-4-tert-Butylcyclohexanecarboxylic acid
CAS:
943-29-3
MF:
C11H20O2
Structure:
Chemical Name:
Chloromethyltriethoxysilane
CAS:
15267-95-5
MF:
C7H17ClO3Si
Structure:
Chemical Name:
4-(TERT-BUTOXY)BENZALDEHYDE
CAS:
57699-45-3
MF:
C11H14O2
Structure:
Chemical Name:
Cyclopropyl phenyl ketone
CAS:
3481-02-5
MF:
C10H10O
Structure:
Chemical Name:
4,4'-Diaminobenzophenone
CAS:
611-98-3
MF:
C13H12N2O
Structure:
Chemical Name:
4-BENZOYLBUTYRIC ACID
CAS:
1501-05-9
MF:
C11H12O3
Structure:
Chemical Name:
Tetrapropylammonium iodide
CAS:
631-40-3
MF:
C12H28IN
Structure:
Chemical Name:
TRIMETHYLSULFOXONIUM BROMIDE
CAS:
25596-24-1
MF:
C3H9BrOS
Structure:
Chemical Name:
TRIMETHYLENE OXIDE
CAS:
503-30-0
MF:
C3H6O
Structure:
Chemical Name:
Chalcone
CAS:
94-41-7
MF:
C15H12O
Structure:
Chemical Name:
3,4,9,10-Perylenetetracarboxylic diimide
CAS:
81-33-4
MF:
C24H10N2O4
Structure:
Chemical Name:
(Pentamethylcyclopentadien-1-yl)trimethylsilane
CAS:
87778-95-8
MF:
C13H24Si
Structure:
Chemical Name:
2,4,6-Triisopropylbenzene-sulfonyl azide
CAS:
36982-84-0
MF:
C15H23N3O2S
Structure:
Chemical Name:
(S)-(+)-KETOPINIC ACID
CAS:
40724-67-2
MF:
C10H14O3
Structure:
Chemical Name:
2-(TRIMETHYLSILYLOXY)FURAN
CAS:
61550-02-5
MF:
C7H12O2Si
Structure:
Chemical Name:
TETRA-N-HEXYLAMMONIUM BROMIDE
CAS:
4328-13-6
MF:
C24H52BrN
Structure:
Chemical Name:
3,4-Difluorobenzophenone
CAS:
85118-07-6
MF:
C13H8F2O
Structure:
Chemical Name:
ALIZARIN-5-SULFONIC ACID
CAS:
6373-42-8
MF:
C14H8O7S
Structure:
Chemical Name:
3-Phenoxybenzoic acid
CAS:
3739-38-6
MF:
C13H10O3
Structure:
Chemical Name:
Acetophenone oxime
CAS:
613-91-2
MF:
C8H9NO
Structure:
Chemical Name:
DI-N-DODECYL SULFOXIDE
CAS:
2168-96-9
MF:
C24H50OS
Structure:
Chemical Name:
2-CHLOROBENZYL MERCAPTAN
CAS:
39718-00-8
MF:
C7H7ClS
Structure:
Chemical Name:
2-CHLORO-6-FLUOROBENZYLAMINE
CAS:
15205-15-9
MF:
C7H7ClFN
Structure:
Chemical Name:
4-tert-Butyldiphenyl sulfide
CAS:
85609-03-6
MF:
C16H18S
Structure:
Chemical Name:
PHTHALAMIC ACID
CAS:
88-97-1
MF:
C8H7NO3
Structure:
Chemical Name:
HOLMIUM (III) TRIFLUOROMETHANESULFONATE
CAS:
139177-63-2
MF:
C3F9HoO9S3
Structure:
Chemical Name:
2-Chloroethyl chloroformate
CAS:
627-11-2
MF:
C3H4Cl2O2
Structure:
Chemical Name:
2-CHLOROETHYL 4-CHLOROPHENYL SULFONE
CAS:
16191-84-7
MF:
C8H8Cl2O2S
Structure:
Chemical Name:
2,4-DIBROMOANISOLE
CAS:
21702-84-1
MF:
C7H6Br2O
Structure:
Chemical Name:
ACETONE DIMETHYLHYDRAZONE
CAS:
13483-31-3
MF:
C5H12N2