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:
Tetraethylene glycol dimethyl ether
CAS:
143-24-8
MF:
C10H22O5
Structure:
Chemical Name:
1,1,3,3-Tetramethyldisiloxane
CAS:
3277-26-7
MF:
C4H14OSi2
Structure:
Chemical Name:
4-Bromobenzoyl chloride
CAS:
586-75-4
MF:
C7H4BrClO
Structure:
Chemical Name:
3-Furanboronic acid
CAS:
55552-70-0
MF:
C4H5BO3
Structure:
Chemical Name:
2-FLUORO-5-(TRIFLUOROMETHYL)PHENYLBORONIC ACID
CAS:
352535-96-7
MF:
C7H5BF4O2
Structure:
Chemical Name:
2-FLUORO-3-(TRIFLUOROMETHYL)PHENYLACETIC ACID
CAS:
178748-05-5
MF:
C9H6F4O2
Structure:
Chemical Name:
Trimethylsulfoxonium iodide
CAS:
1774-47-6
MF:
C3H9IOS
Structure:
Chemical Name:
Betaine hydrochloride
CAS:
590-46-5
MF:
C5H12ClNO2
Structure:
Chemical Name:
NEOPENTYL ALCOHOL
CAS:
75-84-3
MF:
C5H12O
Structure:
Chemical Name:
2-Bromopropionyl bromide
CAS:
563-76-8
MF:
C3H4Br2O
Structure:
Chemical Name:
Bromo-tris-pyrrolidino-phosphonium hexafluorophosphate
CAS:
132705-51-2
MF:
C12H24BrF6N3P2
Structure:
Chemical Name:
1-Chloroethyl chloroformate
CAS:
50893-53-3
MF:
C3H4Cl2O2
Structure:
Chemical Name:
1-Acetyl-2-phenylhydrazine
CAS:
114-83-0
MF:
C8H10N2O
Structure:
Chemical Name:
Phenylboronic acid
CAS:
98-80-6
MF:
C6H7BO2
Structure:
Chemical Name:
Thiosalicylic acid
CAS:
147-93-3
MF:
C7H6O2S
Structure:
Chemical Name:
2,4-Diaminophenetole sulfate
CAS:
68015-98-5
MF:
C8H14N2O5S
Structure:
Chemical Name:
2'-Fluoroacetophenone
CAS:
445-27-2
MF:
C8H7FO
Structure:
Chemical Name:
4-Chlorobutyronitrile
CAS:
628-20-6
MF:
C4H6ClN
Structure:
Chemical Name:
5-Bromofuroic acid
CAS:
585-70-6
MF:
C5H3BrO3
Structure:
Chemical Name:
α-Lipoic Acid
CAS:
1077-28-7
MF:
C8H14O2S2
Structure:
Chemical Name:
2-Tolylboronic acid
CAS:
16419-60-6
MF:
C7H9BO2
Structure:
Chemical Name:
1,5-EDANS SODIUM SALT
CAS:
100900-07-0
MF:
C12H13N2NaO3S
Structure:
Chemical Name:
Cyclobutanemethanol
CAS:
4415-82-1
MF:
C5H10O
Structure:
Chemical Name:
DL-Tartaric acid
CAS:
133-37-9
MF:
C4H6O6
Structure:
Chemical Name:
9-Anthraldehyde
CAS:
642-31-9
MF:
C15H10O
Structure:
Chemical Name:
Ethyl 4-bromobutyrate
CAS:
2969-81-5
MF:
C6H11BrO2
Structure:
Chemical Name:
3-(TRIFLUOROMETHYL)BENZYL MERCAPTAN
CAS:
25697-55-6
MF:
C8H7F3S
Structure:
Chemical Name:
o-Toluoyl chloride
CAS:
933-88-0
MF:
C8H7ClO
Structure:
Chemical Name:
Methyl acetoacetate
CAS:
105-45-3
MF:
C5H8O3
Structure:
Chemical Name:
1,4-Benzodioxan-2-carboxylic acid
CAS:
3663-80-7
MF:
C9H8O4
Structure:
Chemical Name:
(S)-(-)-1,2-Diaminopropane dihydrochloride
CAS:
19777-66-3
MF:
C3H11ClN2
Structure:
Chemical Name:
4-Hydroxyphenethyl alcohol
CAS:
501-94-0
MF:
C8H10O2
Structure:
Chemical Name:
2,3-Dichlorobenzoic acid
CAS:
50-45-3
MF:
C7H4Cl2O2
Structure:
Chemical Name:
1,2-Dianilinoethane
CAS:
150-61-8
MF:
C14H16N2
Structure:
Chemical Name:
3'-Bromoacetophenone
CAS:
2142-63-4
MF:
C8H7BrO
Structure:
Chemical Name:
4-Chloro-2-nitrobenzoic acid
CAS:
6280-88-2
MF:
C7H4ClNO4
Structure:
Chemical Name:
2-Bromo-3-methylbenzoic acid
CAS:
53663-39-1
MF:
C8H7BrO2
Structure:
Chemical Name:
3,5-Dihydroxyacetophenone
CAS:
51863-60-6
MF:
C8H8O3
Structure:
Chemical Name:
2'-Bromoacetophenone
CAS:
2142-69-0
MF:
C8H7BrO
Structure:
Chemical Name:
3'-Fluoroacetophenone
CAS:
455-36-7
MF:
C8H7FO
Structure:
Chemical Name:
3,3-Dimethylbutyryl chloride
CAS:
7065-46-5
MF:
C6H11ClO
Structure:
Chemical Name:
3-Fluoro-4-hydroxybenzoic acid
CAS:
350-29-8
MF:
C7H5FO3
Structure:
Chemical Name:
2-Chloropropionyl chloride
CAS:
7623-09-8
MF:
C3H4Cl2O
Structure:
Chemical Name:
3-Fluoro-4-nitrophenol
CAS:
394-41-2
MF:
C6H4FNO3
Structure:
Chemical Name:
Benzo[b]thien-2-ylboronic acid
CAS:
98437-23-1
MF:
C8H7BO2S
Structure:
Chemical Name:
Methyl 4-cyanobenzoate
CAS:
1129-35-7
MF:
C9H7NO2
Structure:
Chemical Name:
1-Iodobutane
CAS:
542-69-8
MF:
C4H9I
Structure:
Chemical Name:
tert-Butyl 3-oxoazetidine-1-carboxylate
CAS:
398489-26-4
MF:
C8H13NO3
Structure:
Chemical Name:
2-Carboxyphenylboronic acid
CAS:
149105-19-1
MF:
C7H7BO4
Structure:
Chemical Name:
4-Bromo-3,5-dimethylphenol
CAS:
7463-51-6
MF:
C8H9BrO
Structure:
Chemical Name:
N-(2-Methylphenyl)thiourea
CAS:
614-78-8
MF:
C8H10N2S
Structure:
Chemical Name:
Methyl 4-methoxyacetoacetate
CAS:
41051-15-4
MF:
C6H10O4
Structure:
Chemical Name:
4-(Hydroxymethyl)phenylboronic acid
CAS:
59016-93-2
MF:
C7H9BO3
Structure:
Chemical Name:
2-Bromo-5-chlorobenzoic acid
CAS:
21739-93-5
MF:
C7H4BrClO2
Structure:
Chemical Name:
Acetyl bromide
CAS:
506-96-7
MF:
C2H3BrO
Structure:
Chemical Name:
2-Naphthaldehyde
CAS:
66-99-9
MF:
C11H8O
Structure:
Chemical Name:
2-AMINOISOPHTHALIC ACID
CAS:
39622-79-2
MF:
C8H7NO4
Structure:
Chemical Name:
3-Chloro-2-nitrobenzoic acid
CAS:
4771-47-5
MF:
C7H4ClNO4
Structure:
Chemical Name:
3'-Chloroacetophenone
CAS:
99-02-5
MF:
C8H7ClO
Structure:
Chemical Name:
1,2-Bis(diphenylphosphino)ethane nickel(II) chloride
CAS:
14647-23-5
MF:
C26H24Cl2NiP2
Structure:
Chemical Name:
3-Chloro-4-methylphenylboronic acid
CAS:
175883-63-3
MF:
C7H8BClO2
Structure:
Chemical Name:
2-Chloromandelic acid
CAS:
10421-85-9
MF:
C8H7ClO3
Structure:
Chemical Name:
2',4'-Difluoroacetophenone
CAS:
364-83-0
MF:
C8H6F2O
Structure:
Chemical Name:
4-METHYLPHENYLTHIOUREA
CAS:
622-52-6
MF:
C8H10N2S
Structure:
Chemical Name:
Perylene
CAS:
198-55-0
MF:
C20H12
Structure:
Chemical Name:
4-Methoxyphenylacetone
CAS:
122-84-9
MF:
C10H12O2
Structure:
Chemical Name:
Methyl carbazate
CAS:
6294-89-9
MF:
C2H6N2O2
Structure:
Chemical Name:
1-(Trimethylsilyl)-1-propyne
CAS:
6224-91-5
MF:
C6H12Si
Structure:
Chemical Name:
4-(4-Methoxyphenyl)butyric acid
CAS:
4521-28-2
MF:
C11H14O3
Structure:
Chemical Name:
4-Fluoro-2-methylphenylboronic acid
CAS:
139911-29-8
MF:
C7H8BFO2
Structure:
Chemical Name:
Sodium dicyanamide
CAS:
1934-75-4
MF:
C2N3Na
Structure:
Chemical Name:
4-Aminophenylboronic acid pinacol ester
CAS:
214360-73-3
MF:
C12H18BNO2
Structure:
Chemical Name:
Carboxymethoxylamine hemihydrochloride
CAS:
2921-14-4
MF:
C2H6ClNO3
Structure:
Chemical Name:
Dimethyl maleate
CAS:
624-48-6
MF:
C6H8O4
Structure:
Chemical Name:
3-Hydroxybenzoic acid
CAS:
99-06-9
MF:
C7H6O3
Structure:
Chemical Name:
4-Chloro-1-butanol
CAS:
928-51-8
MF:
C4H9ClO
Structure:
Chemical Name:
4-Fluoro-3-(trifluoromethyl)aniline
CAS:
2357-47-3
MF:
C7H5F4N
Structure:
Chemical Name:
Methyl 5-chloroanthranilate
CAS:
5202-89-1
MF:
C8H8ClNO2
Structure:
Chemical Name:
Ethyl 4-bromophenylacetate
CAS:
14062-25-0
MF:
C10H11BrO2
Structure:
Chemical Name:
4,4'-Diaminodicyclohexyl methane
CAS:
1761-71-3
MF:
C13H26N2
Structure:
Chemical Name:
4-Methoxyphenylacetic acid
CAS:
104-01-8
MF:
C9H10O3
Structure:
Chemical Name:
3-Chlorobenzyl cyanide
CAS:
1529-41-5
MF:
C8H6ClN
Structure:
Chemical Name:
Ethylparaben
CAS:
120-47-8
MF:
C9H10O3
Structure:
Chemical Name:
2-ACETYLBENZENECARBONITRILE
CAS:
91054-33-0
MF:
C9H7NO
Structure:
Chemical Name:
5-Nitrosalicylic acid
CAS:
96-97-9
MF:
C7H5NO5
Structure:
Chemical Name:
D-3-Bromocamphor-8-sulfonic acid ammonium salt
CAS:
14575-84-9
MF:
C10H18BrNO4S
Structure:
Chemical Name:
3-BROMO-4-CHLORO-BENZALDEHYDE
CAS:
86265-88-5
MF:
C7H4BrClO
Structure:
Chemical Name:
4-Chlorobutyryl chloride
CAS:
4635-59-0
MF:
C4H6Cl2O
Structure:
Chemical Name:
9-Anthraceneboronic acid
CAS:
100622-34-2
MF:
C14H11BO2
Structure:
Chemical Name:
2,2,2-Trifluoroethyl trifluoromethanesulfonate
CAS:
6226-25-1
MF:
C3H2F6O3S
Structure:
Chemical Name:
1,2-Dimethoxybenzene
CAS:
91-16-7
MF:
C8H10O2
Structure:
Chemical Name:
Benzyltrimethylammonium chloride
CAS:
56-93-9
MF:
C10H16ClN
Structure:
Chemical Name:
2,5-Dimethylbenzoic acid
CAS:
610-72-0
MF:
C9H10O2
Structure:
Chemical Name:
4'-Fluoro-2'-hydroxyacetophenone
CAS:
1481-27-2
MF:
C8H7FO2
Structure:
Chemical Name:
Phenyl vinyl sulfone
CAS:
5535-48-8
MF:
C8H8O2S
Structure:
Chemical Name:
Cyclen
CAS:
294-90-6
MF:
C8H20N4
Structure:
Chemical Name:
7-Methoxy-1-tetralone
CAS:
6836-19-7
MF:
C11H12O2
Structure:
Chemical Name:
Sodium 2-naphthol-7-sulfonate
CAS:
135-55-7
MF:
C10H9NaO4S
Structure:
Chemical Name:
(S)-(-)-2,2'-Bis(diphenylphosphino)-1,1'-binaphthyl
CAS:
76189-56-5
MF:
C44H32P2
Structure:
Chemical Name:
2-Hydroxyethylhydrazine
CAS:
109-84-2
MF:
C2H8N2O