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-(N-Ethyl-m-toluidino)ethanol
CAS:
91-88-3
MF:
C11H17NO
Structure:
Chemical Name:
L-LEUCIC ACID
CAS:
13748-90-8
MF:
C6H12O3
Structure:
Chemical Name:
2,3-Dicyanonaphthalene
CAS:
22856-30-0
MF:
C12H6N2
Structure:
Chemical Name:
BENZYLUREA
CAS:
538-32-9
MF:
C8H10N2O
Structure:
Chemical Name:
9,10-DICYANOANTHRACENE
CAS:
1217-45-4
MF:
C16H8N2
Structure:
Chemical Name:
1,3-CYCLOHEXADIENE
CAS:
592-57-4
MF:
C6H8
Structure:
Chemical Name:
1-TRIMETHYLSILYLMETHANOL
CAS:
3219-63-4
MF:
C4H12OSi
Structure:
Chemical Name:
4-BROMOBENZHYDROL
CAS:
611-95-0
MF:
C14H10O3
Structure:
Chemical Name:
1,3-Dibromo-2-propanol
CAS:
96-21-9
MF:
C3H6Br2O
Structure:
Chemical Name:
SODIUM 2-MERCAPTO-1H-BENZO[D]IMIDAZOLE-5-SULFONATE
CAS:
53918-03-9
MF:
C7H5N2NaO3S2
Structure:
Chemical Name:
4-BROMOPHENYL CHLOROFORMATE
CAS:
7693-44-9
MF:
C7H4BrClO2
Structure:
Chemical Name:
4-NITROISOPHTHALIC ACID
CAS:
4315-09-7
MF:
C8H5NO6
Structure:
Chemical Name:
1,2-Bis(cyanomethyl)benzene
CAS:
613-73-0
MF:
C10H8N2
Structure:
Chemical Name:
Methylhydrazine sulfate
CAS:
302-15-8
MF:
CH8N2O4S
Structure:
Chemical Name:
DIPHENYLSULFONE-3,3'-DISULFONIC ACID DISODIUM SALT
CAS:
39616-93-8
MF:
C12H8Na2O8S3
Structure:
Chemical Name:
3-METHOXY-4-METHYLBENZALDEHYDE
CAS:
24973-22-6
MF:
C9H10O2
Structure:
Chemical Name:
CAPRYLOHYDROXAMIC ACID SODIUM SALT
CAS:
50292-00-7
MF:
C8H16NNaO2
Structure:
Chemical Name:
1,2-BENZANTHRAQUINONE
CAS:
2498-66-0
MF:
C18H10O2
Structure:
Chemical Name:
METHYL NONANOATE
CAS:
1731-84-6
MF:
C10H20O2
Structure:
Chemical Name:
3-Amino-4-methylbenzamide
CAS:
19406-86-1
MF:
C8H10N2O
Structure:
Chemical Name:
1-(3,4,5-TRIMETHOXYPHENYL)-2-THIOUREA
CAS:
59083-54-4
MF:
C10H14N2O3S
Structure:
Chemical Name:
Trimethylsilyl Isocyanate
CAS:
1118-02-1
MF:
C4H9NOSi
Structure:
Chemical Name:
(S)-(+)-Phenylsuccinic acid
CAS:
4036-30-0
MF:
C10H10O4
Structure:
Chemical Name:
M-TOLYLUREA
CAS:
63-99-0
MF:
C8H10N2O
Structure:
Chemical Name:
4-METHOXYPHENYL TRIFLUOROMETHANESULFONATE
CAS:
66107-29-7
MF:
C8H7F3O4S
Structure:
Chemical Name:
4-Propoxyphenylboronic acid
CAS:
186497-67-6
MF:
C9H13BO3
Structure:
Chemical Name:
4-NITRODIPHENYL SULFONE
CAS:
1146-39-0
MF:
C12H9NO4S
Structure:
Chemical Name:
4-ETHYLANISOLE
CAS:
1515-95-3
MF:
C9H12O
Structure:
Chemical Name:
3-BROMOPROPIONITRILE
CAS:
2417-90-5
MF:
C3H4BrN
Structure:
Chemical Name:
4,4'-Dimethylbenzophenone
CAS:
611-97-2
MF:
C15H14O
Structure:
Chemical Name:
5-Methyl-2-hexanone
CAS:
110-12-3
MF:
C7H14O
Structure:
Chemical Name:
TETRAPENTYLAMMONIUM BROMIDE
CAS:
866-97-7
MF:
C20H44BrN
Structure:
Chemical Name:
1,1'-BINAPHTHYL
CAS:
604-53-5
MF:
C20H14
Structure:
Chemical Name:
4-Chlorobenzene-1-carboximidamide hydrochloride
CAS:
14401-51-5
MF:
C7H8Cl2N2
Structure:
Chemical Name:
1,8-Diamino-3,6-dioxaoctane
CAS:
929-59-9
MF:
C6H16N2O2
Structure:
Chemical Name:
1-METHYL-3-PROPYLIMIDAZOLIUM IODIDE
CAS:
119171-18-5
MF:
C7H13IN2
Structure:
Chemical Name:
1-Benzosuberone
CAS:
826-73-3
MF:
C11H12O
Structure:
Chemical Name:
P-TOLUENESULFONIC ACID N-OCTYL ESTER
CAS:
3386-35-4
MF:
C15H24O3S
Structure:
Chemical Name:
Bis(trimethylsilyl)carbodiimide
CAS:
1000-70-0
MF:
C7H18N2Si2
Structure:
Chemical Name:
4-METHOXY-3-NITROBENZOTRIFLUORIDE
CAS:
394-25-2
MF:
C8H6F3NO3
Structure:
Chemical Name:
tert-dodecylthiol
CAS:
25103-58-6
MF:
C12H26S
Structure:
Chemical Name:
1-BUTYL-3-METHYLIMIDAZOLIUM TRIFLUOROMETHANESULFONATE
CAS:
145022-48-6
MF:
C9H15F3N2O3S
Structure:
Chemical Name:
BENZOIN METHYL ETHER
CAS:
3524-62-7
MF:
C15H14O2
Structure:
Chemical Name:
4-BENZYLBIPHENYL
CAS:
613-42-3
MF:
C19H16
Structure:
Chemical Name:
2-AMINO-2'-NITRO DIPHENYL SULFIDE
CAS:
19284-81-2
MF:
C12H10N2O2S
Structure:
Chemical Name:
3-FLUOROPYRIDINE-4-BORONIC ACID
CAS:
458532-97-3
MF:
C5H5BFNO2
Structure:
Chemical Name:
(R)-2-METHYL-CBS-OXAZABOROLIDINE
CAS:
133261-83-3
MF:
C18H20BNO
Structure:
Chemical Name:
Methyl 5-bromovalerate
CAS:
5454-83-1
MF:
C6H11BrO2
Structure:
Chemical Name:
BIS(3-FLUOROPHENYL)DISULFIDE
CAS:
63930-17-6
MF:
C12H8F2S2
Structure:
Chemical Name:
HEPTADECANOIC ACID
CAS:
506-12-7
MF:
C17H34O2
Structure:
Chemical Name:
(4-CHLOROCARBONYLPHENYL)BORONIC ANHYDRIDE
CAS:
332154-57-1
MF:
C7H6BClO3
Structure:
Chemical Name:
1-HEPTYL-3-PHENYL-2-THIOUREA
CAS:
79425-04-0
MF:
C14H22N2S
Structure:
Chemical Name:
(R)-(-)-2,2'-Bis(p-toluenesulfonyloxy)-1,1'-binaphthalene
CAS:
137568-37-7
MF:
C34H26O6S2
Structure:
Chemical Name:
2-(Trifluoromethoxy)benzene-1-sulfonyl chloride
CAS:
103008-51-1
MF:
C7H4ClF3O3S
Structure:
Chemical Name:
N-ACETYLGUANIDINE
CAS:
5699-40-1
MF:
C3H7N3O
Structure:
Chemical Name:
3-METHYLBENZYL MERCAPTAN
CAS:
25697-56-7
MF:
C8H10S
Structure:
Chemical Name:
N,N-Diphenylhydrazinium chloride
CAS:
530-47-2
MF:
C12H13ClN2
Structure:
Chemical Name:
N-HEXYLTRIETHOXYSILANE
CAS:
18166-37-5
MF:
C12H28O3Si
Structure:
Chemical Name:
2,3-Dimethyl-1-butene
CAS:
563-78-0
MF:
C6H12
Structure:
Chemical Name:
O-ISOBUTYLHYDROXYLAMINE HYDROCHLORIDE
CAS:
6084-58-8
MF:
C4H12ClNO
Structure:
Chemical Name:
TRANS-1,2-DICHLOROETHYLENE
CAS:
156-60-5
MF:
C2H2Cl2
Structure:
Chemical Name:
PYRIDO[3,2-D][1,3]THIAZOLE-2-THIOL
CAS:
57135-09-8
MF:
C6H4N2S2
Structure:
Chemical Name:
Bromanil
CAS:
488-48-2
MF:
C6Br4O2
Structure:
Chemical Name:
1,1,1-Tris(hydroxymethyl)ethane
CAS:
77-85-0
MF:
C5H12O3
Structure:
Chemical Name:
Tripropyl orthoformate
CAS:
621-76-1
MF:
C10H22O3
Structure:
Chemical Name:
4-Isobutylbenzaldehyde
CAS:
40150-98-9
MF:
C11H14O
Structure:
Chemical Name:
(R)-(+)-2,2-DIMETHYL-1,3-DIOXOLANE-4-CARBOXYLIC ACID METHYL ESTER
CAS:
52373-72-5
MF:
C7H12O4
Structure:
Chemical Name:
Hexahydrophthalic anhydride
CAS:
85-42-7
MF:
C8H10O3
Structure:
Chemical Name:
N-Methylpropionamide
CAS:
1187-58-2
MF:
C4H9NO
Structure:
Chemical Name:
5-Amino-1-naphthol
CAS:
83-55-6
MF:
C10H9NO
Structure:
Chemical Name:
Dichlorophenylborane
CAS:
873-51-8
MF:
C6H5BCl2
Structure:
Chemical Name:
1-(2-Hydroxy-5-methylphenyl)ethanone
CAS:
1450-72-2
MF:
C9H10O2
Structure:
Chemical Name:
CHLOROCARBONYLSULFENYL CHLORIDE
CAS:
2757-23-5
MF:
CCl2OS
Structure:
Chemical Name:
3,4,5-Trimethoxybenzoyl chloride
CAS:
4521-61-3
MF:
C10H11ClO4
Structure:
Chemical Name:
Phenyl chlorothionocarbonate
CAS:
1005-56-7
MF:
C7H5ClOS
Structure:
Chemical Name:
3-(3-CHLOROPHENYL)PROPIONIC ACID
CAS:
21640-48-2
MF:
C9H9ClO2
Structure:
Chemical Name:
2-Methoxyethyl acrylate
CAS:
3121-61-7
MF:
C6H10O3
Structure:
Chemical Name:
4,4'-BIPHENYLDICARBONITRILE
CAS:
1591-30-6
MF:
C14H8N2
Structure:
Chemical Name:
1-Methyl-3-nitroguanidine
CAS:
4245-76-5
MF:
C2H6N4O2
Structure:
Chemical Name:
1-Butylpyridinium chloride
CAS:
1124-64-7
MF:
C9H14ClN
Structure:
Chemical Name:
2,3-Dichlorobenzyl chloride
CAS:
3290-01-5
MF:
C7H5Cl3
Structure:
Chemical Name:
3-Fluorophenethyl alcohol
CAS:
52059-53-7
MF:
C8H9FO
Structure:
Chemical Name:
2,3,5,6-Tetrachloropyridine-4-thiol
CAS:
10351-06-1
MF:
C5HCl4NS
Structure:
Chemical Name:
2-CHLORO-4-METHYLBENZOIC ACID
CAS:
7697-25-8
MF:
C8H7ClO2
Structure:
Chemical Name:
2-Methyl-4-(trifluoromethyl) aniline
CAS:
67169-22-6
MF:
C8H8F3N
Structure:
Chemical Name:
2 6-DIFLUORO-4-METHOXYPHENYLBORONIC ACID
CAS:
406482-20-0
MF:
C7H7BF2O3
Structure:
Chemical Name:
(2-sulfanylphenyl)boronic acid
CAS:
352526-00-2
MF:
C6H7BO2S
Structure:
Chemical Name:
Furan-2-carbohydrazide
CAS:
3326-71-4
MF:
C5H6N2O2
Structure:
Chemical Name:
3-Chlorophenoxyacetic acid
CAS:
588-32-9
MF:
C8H7ClO3
Structure:
Chemical Name:
1,4-DIETHYLBENZENE
CAS:
105-05-5
MF:
C10H14
Structure:
Chemical Name:
2-(METHYLTHIO)BENZOIC ACID
CAS:
3724-10-5
MF:
C8H8O2S
Structure:
Chemical Name:
Cyclopentyl chloroformate
CAS:
50715-28-1
MF:
C6H9ClO2
Structure:
Chemical Name:
2-PIPERIDINOACETAMIDOXIME
CAS:
175136-64-8
MF:
C7H15N3O
Structure:
Chemical Name:
PENTAFLUOROTHIOPHENOL
CAS:
771-62-0
MF:
C6HF5S
Structure:
Chemical Name:
2,5-DIFLUOROPHENYL ISOCYANATE
CAS:
39718-32-6
MF:
C7H3F2NO
Structure:
Chemical Name:
DIETHYL ETHYLPHOSPHONATE
CAS:
78-38-6
MF:
C6H15O3P
Structure:
Chemical Name:
Tridecanoic acid
CAS:
638-53-9
MF:
C13H26O2
Structure:
Chemical Name:
3,3,3-TRIFLUORO-1-PROPANOL
CAS:
2240-88-2
MF:
C3H5F3O
Structure:
Chemical Name:
N-Ethyl-3-carbazolecarboxaldehyde
CAS:
7570-45-8
MF:
C15H13NO
Structure:
Chemical Name:
2-Phenoxyethyl chloride
CAS:
622-86-6
MF:
C8H9ClO