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-FLUOROCATECHOL
CAS:
363-52-0
MF:
C6H5FO2
Structure:
Chemical Name:
3-tert-Butylphenol
CAS:
585-34-2
MF:
C10H14O
Structure:
Chemical Name:
DIPROPYL PHTHALATE
CAS:
131-16-8
MF:
C14H18O4
Structure:
Chemical Name:
1,1,3,3-Tetramethylurea
CAS:
632-22-4
MF:
C5H12N2O
Structure:
Chemical Name:
Indan
CAS:
496-11-7
MF:
C9H10
Structure:
Chemical Name:
5-Cyanothiophene-2-boronic acid
CAS:
305832-67-1
MF:
C5H4BNO2S
Structure:
Chemical Name:
2-CHLORO-3-NITROTOLUENE
CAS:
3970-40-9
MF:
C7H6ClNO2
Structure:
Chemical Name:
1,3-Di-tert-butyl-2-thiourea
CAS:
4041-95-6
MF:
C9H20N2S
Structure:
Chemical Name:
4-(BROMOMETHYL)PHENYLACETIC ACID
CAS:
13737-36-5
MF:
C9H9BrO2
Structure:
Chemical Name:
2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid
CAS:
4065-45-6
MF:
C14H12O6S
Structure:
Chemical Name:
Benzoin
CAS:
119-53-9
MF:
C14H12O2
Structure:
Chemical Name:
4'-Chloro-3'-nitroacetophenone
CAS:
5465-65-6
MF:
C8H6ClNO3
Structure:
Chemical Name:
Isobutyl methacrylate
CAS:
97-86-9
MF:
C8H14O2
Structure:
Chemical Name:
1-Butyl-3-methylimidazolium tetrafluoroborate
CAS:
174501-65-6
MF:
C8H15BF4N2
Structure:
Chemical Name:
1,1,1-Trimethoxypentane
CAS:
13820-09-2
MF:
C8H18O3
Structure:
Chemical Name:
2,5-DICHLOROTHIOPHENOL
CAS:
5858-18-4
MF:
C6H4Cl2S
Structure:
Chemical Name:
3-(Chlorosulfonyl)benzoic acid
CAS:
4025-64-3
MF:
C7H5ClO4S
Structure:
Chemical Name:
5-Methoxysalicylic acid
CAS:
2612-02-4
MF:
C8H8O4
Structure:
Chemical Name:
Benzyl 2-bromoethyl ether
CAS:
1462-37-9
MF:
C9H11BrO
Structure:
Chemical Name:
Pyridine-2-carbonyl chloride hydrochloride
CAS:
39901-94-5
MF:
C6H5Cl2NO
Structure:
Chemical Name:
Trimethylhydroquinone
CAS:
700-13-0
MF:
C9H12O2
Structure:
Chemical Name:
4,4'-Dinitrodiphenyl disulfide
CAS:
100-32-3
MF:
C12H8N2O4S2
Structure:
Chemical Name:
2,4-Dimethylbenzaldehyde
CAS:
15764-16-6
MF:
C9H10O
Structure:
Chemical Name:
2-methylhexanoic acid
CAS:
4536-23-6
MF:
C7H14O2
Structure:
Chemical Name:
4-CHLORO-2-FLUOROPHENYLHYDRAZINE HYDROCHLORIDE
CAS:
64172-78-7
MF:
C6H7Cl2FN2
Structure:
Chemical Name:
3,5-Dimethylphenylhydrazine hydrochloride
CAS:
60481-36-9
MF:
C8H13ClN2
Structure:
Chemical Name:
XANTHENE-9-CARBOXYLIC ACID
CAS:
82-07-5
MF:
C14H10O3
Structure:
Chemical Name:
2-HYDROXYTHIOPHENOL
CAS:
1121-24-0
MF:
C6H6OS
Structure:
Chemical Name:
2,6-DICHLOROPHENYLBORONIC ACID
CAS:
73852-17-2
MF:
C6H5BCl2O2
Structure:
Chemical Name:
(1-ETHOXYCYCLOPROPOXY)TRIMETHYLSILANE
CAS:
27374-25-0
MF:
C8H18O2Si
Structure:
Chemical Name:
3,3,3-Trifluoropropionic acid
CAS:
2516-99-6
MF:
C3H3F3O2
Structure:
Chemical Name:
Tetrachloroterephthalonitrile
CAS:
1897-41-2
MF:
C8Cl4N2
Structure:
Chemical Name:
2-FLUORO-3-(TRIFLUOROMETHYL)BENZOIC ACID
CAS:
115029-22-6
MF:
C8H4F4O2
Structure:
Chemical Name:
4-(Trifluoromethoxy)benzenesulfonyl chloride
CAS:
94108-56-2
MF:
C7H4ClF3O3S
Structure:
Chemical Name:
4-BROMO-3-CHLOROBENZOIC ACID
CAS:
25118-59-6
MF:
C7H4BrClO2
Structure:
Chemical Name:
Decanoic acid
CAS:
334-48-5
MF:
C10H20O2
Structure:
Chemical Name:
Dibenzofuran-4-boronic acid
CAS:
100124-06-9
MF:
C12H9BO3
Structure:
Chemical Name:
Perfluoro-1-iodohexane
CAS:
355-43-1
MF:
C6F13I
Structure:
Chemical Name:
Phenylsilane
CAS:
694-53-1
MF:
C6H8Si
Structure:
Chemical Name:
4-BROMO-2-(TRIFLUOROMETHYL)BENZONITRILE
CAS:
191165-13-6
MF:
C8H3BrF3N
Structure:
Chemical Name:
2-Hexanone
CAS:
591-78-6
MF:
C6H12O
Structure:
Chemical Name:
tert-Butyl ethyl ether
CAS:
637-92-3
MF:
C6H14O
Structure:
Chemical Name:
2,4-DIMETHYLSULFOLANE
CAS:
1003-78-7
MF:
C6H12O2S
Structure:
Chemical Name:
N-HEXYLTHIOUREA
CAS:
21071-27-2
MF:
C7H16N2S
Structure:
Chemical Name:
5-Bromo-2-chlorophenol
CAS:
183802-98-4
MF:
C6H4BrClO
Structure:
Chemical Name:
Biphenyl-4,4'-dithiol
CAS:
6954-27-4
MF:
C12H10S2
Structure:
Chemical Name:
4-BROMO-2,6-DIMETHYLANISOLE
CAS:
14804-38-7
MF:
C9H11BrO
Structure:
Chemical Name:
Methoxyacetyl chloride
CAS:
38870-89-2
MF:
C3H5ClO2
Structure:
Chemical Name:
Benzyl isocyanate
CAS:
3173-56-6
MF:
C8H7NO
Structure:
Chemical Name:
Benzoyl cyanide
CAS:
613-90-1
MF:
C8H5NO
Structure:
Chemical Name:
2,3,5,6-TETRAMETHYL-1,4-PHENYLENEDIAMINE
CAS:
3102-87-2
MF:
C10H16N2
Structure:
Chemical Name:
(R)-(+)-1-Phenylethanol
CAS:
1517-69-7
MF:
C8H10O
Structure:
Chemical Name:
Diethyl glutarate
CAS:
818-38-2
MF:
C9H16O4
Structure:
Chemical Name:
Oxalyl dihydrazide
CAS:
996-98-5
MF:
C2H6N4O2
Structure:
Chemical Name:
2-Chloro-4-methylsulphonylbenzoic acid
CAS:
53250-83-2
MF:
C8H7ClO4S
Structure:
Chemical Name:
3-Bromothioanisole
CAS:
33733-73-2
MF:
C7H7BrS
Structure:
Chemical Name:
1,4-Benzodioxan-6-amine
CAS:
22013-33-8
MF:
C8H9NO2
Structure:
Chemical Name:
Phenethyl chloride
CAS:
622-24-2
MF:
C8H9Cl
Structure:
Chemical Name:
4-ACETYLPHENYL TRIFLATE
CAS:
109613-00-5
MF:
C9H7F3O4S
Structure:
Chemical Name:
2-AMINO-4'-BROMOACETOPHENONE HYDROCHLORIDE
CAS:
5467-72-1
MF:
C8H9BrClNO
Structure:
Chemical Name:
2-METHYL-2-BUTANETHIOL
CAS:
1679-09-0
MF:
C5H12S
Structure:
Chemical Name:
3-CHLORO-4'-FLUOROPROPIOPHENONE
CAS:
347-93-3
MF:
C9H8ClFO
Structure:
Chemical Name:
2-AZACYCLOOCTANONE
CAS:
673-66-5
MF:
C7H13NO
Structure:
Chemical Name:
1-Chlorododecane
CAS:
112-52-7
MF:
C12H25Cl
Structure:
Chemical Name:
Ethyl (R)-2-hydroxy-4-phenylbutyrate
CAS:
90315-82-5
MF:
C12H16O3
Structure:
Chemical Name:
4-(2-Aminoethyl)benzenesulfonylfluoride hydrochloride
CAS:
30827-99-7
MF:
C8H11ClFNO2S
Structure:
Chemical Name:
3-(METHYLSULFONYL)BENZOIC ACID
CAS:
5345-27-7
MF:
C8H8O4S
Structure:
Chemical Name:
METHYLSULFONYLACETONE
CAS:
5000-46-4
MF:
C4H8O3S
Structure:
Chemical Name:
2-bromo-4-(trifluoromethyl)benzaldehyde
CAS:
85118-24-7
MF:
C8H4BrF3O
Structure:
Chemical Name:
4-CHLORO-M-TOLUENEBORONIC ACID
CAS:
161950-10-3
MF:
C7H8BClO2
Structure:
Chemical Name:
2-Fluorobenzophenone
CAS:
342-24-5
MF:
C13H9FO
Structure:
Chemical Name:
1-Pentanethiol
CAS:
110-66-7
MF:
C5H12S
Structure:
Chemical Name:
SUBERIC ACID MONOMETHYL ESTER
CAS:
3946-32-5
MF:
C9H16O4
Structure:
Chemical Name:
4,4'-Dichlorobenzophenone
CAS:
90-98-2
MF:
C13H8Cl2O
Structure:
Chemical Name:
2-CHLOROTHIOPHENOL
CAS:
6320-03-2
MF:
C6H5ClS
Structure:
Chemical Name:
2,6-Dimethoxybenzaldehyde
CAS:
3392-97-0
MF:
C9H10O3
Structure:
Chemical Name:
1H-INDAZOLE-5-BORONIC ACID
CAS:
338454-14-1
MF:
C7H7BN2O2
Structure:
Chemical Name:
tert-Butyl 3-bromopropylcarbamate
CAS:
83948-53-2
MF:
C8H16BrNO2
Structure:
Chemical Name:
Dimethoxymethylphenylsilane
CAS:
3027-21-2
MF:
C9H14O2Si
Structure:
Chemical Name:
1,2,4-Benzenetricarboxylic acid
CAS:
528-44-9
MF:
C9H6O6
Structure:
Chemical Name:
LITHIUM NONAFLUOROBUTANESULFONATE
CAS:
131651-65-5
MF:
C4H2F9LiO3S
Structure:
Chemical Name:
1-PHENYL-3-THIOSEMICARBAZIDE
CAS:
645-48-7
MF:
C7H9N3S
Structure:
Chemical Name:
Tetrapropoxysilane
CAS:
682-01-9
MF:
C12H28O4Si
Structure:
Chemical Name:
3-Fluoro-4-hydroxybenzaldehyde
CAS:
405-05-0
MF:
C7H5FO2
Structure:
Chemical Name:
Sodium 2-phenylindole-5-sulfonate
CAS:
119205-39-9
MF:
C14H10NNaO3S
Structure:
Chemical Name:
2,2,3,3-TETRAFLUOROPROPYL 4-TOLUENESULFONATE
CAS:
786-31-2
MF:
C10H10F4O3S
Structure:
Chemical Name:
Triethanolamine borate
CAS:
283-56-7
MF:
C6H12BNO3
Structure:
Chemical Name:
1,2-Phenylenediacetic acid
CAS:
7500-53-0
MF:
C10H10O4
Structure:
Chemical Name:
1-ADAMANTYLTHIOUREA
CAS:
25444-82-0
MF:
C11H18N2S
Structure:
Chemical Name:
3,4,9,10-Perylenetetracarboxylic dianhydride
CAS:
128-69-8
MF:
C24H8O6
Structure:
Chemical Name:
2-Amino-5-chlorobenzonitrile
CAS:
5922-60-1
MF:
C7H5ClN2
Structure:
Chemical Name:
Methyl Oleate
CAS:
112-62-9
MF:
C19H36O2
Structure:
Chemical Name:
3,5-Bis(tert-butyl)benzaldehyde
CAS:
17610-00-3
MF:
C15H22O
Structure:
Chemical Name:
Tetradecyl trimethyl ammonium chloride
CAS:
4574-04-3
MF:
C17H38ClN
Structure:
Chemical Name:
N-Cyanoimido-S,S-dimethyl-dithiocarbonate
CAS:
10191-60-3
MF:
C4H6N2S2
Structure:
Chemical Name:
2,2,2-Trifluoroethyl methacrylate
CAS:
352-87-4
MF:
C6H7F3O2
Structure:
Chemical Name:
3-Chloro-4-fluoroacetophenone
CAS:
2923-66-2
MF:
C8H6ClFO
Structure:
Chemical Name:
4-(2-Bromoacetyl)benzonitrile
CAS:
20099-89-2
MF:
C9H6BrNO
Structure:
Chemical Name:
Amidinothiourea
CAS:
2114-02-5
MF:
C2H6N4S
Structure:
Chemical Name:
Valeronitrile
CAS:
110-59-8
MF:
C5H9N