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-Methylbenzyl cyanide
CAS:
22364-68-7
MF:
C9H9N
Structure:
Chemical Name:
3-Pentanol
CAS:
584-02-1
MF:
C5H12O
Structure:
Chemical Name:
3-(N-Morpholino)propanesulfonic acid hemisodium salt
CAS:
117961-20-3
MF:
C7H16NNaO4S
Structure:
Chemical Name:
2-Hydroxypropyl methacrylate
CAS:
27813-02-1
MF:
C7H12O3
Structure:
Chemical Name:
2-(Dicyclohexylphosphino)-2'-methylbiphenyl
CAS:
251320-86-2
MF:
C25H33P
Structure:
Chemical Name:
Sodium trifluoromethanesulfinate
CAS:
2926-29-6
MF:
CH2F3NaO2S
Structure:
Chemical Name:
Pyromellitic acid
CAS:
89-05-4
MF:
C10H6O8
Structure:
Chemical Name:
1-Dodecanethiol
CAS:
112-55-0
MF:
C12H26S
Structure:
Chemical Name:
3-(Trifluoromethyl)anisole
CAS:
454-90-0
MF:
C8H7F3O
Structure:
Chemical Name:
Sodium (+)-10-camphorsulfonate
CAS:
21791-94-6
MF:
C10H17NaO4S
Structure:
Chemical Name:
TRIS(DIETHYLAMINO)PHOSPHINE
CAS:
2283-11-6
MF:
C12H30N3P
Structure:
Chemical Name:
4-(Trifluoromethoxy)benzyl alcohol
CAS:
1736-74-9
MF:
C8H7F3O2
Structure:
Chemical Name:
1,4-DIPHENYL-3-THIOSEMICARBAZIDE
CAS:
1768-59-8
MF:
C13H13N3S
Structure:
Chemical Name:
3-Hydroxybenzyl alcohol
CAS:
620-24-6
MF:
C7H8O2
Structure:
Chemical Name:
5-Chlorovaleryl chloride
CAS:
1575-61-7
MF:
C5H8Cl2O
Structure:
Chemical Name:
1,2-Benzenedimethanol
CAS:
612-14-6
MF:
C8H10O2
Structure:
Chemical Name:
5-Methylsalicylic acid
CAS:
89-56-5
MF:
C8H8O3
Structure:
Chemical Name:
5-Chloro-2-methoxybenzoic acid
CAS:
3438-16-2
MF:
C8H7ClO3
Structure:
Chemical Name:
2-DICYCLOHEXYLPHOSPHINO-2',6'-DIISOPROPOXYBIPHENYL
CAS:
787618-22-8
MF:
C30H43O2P
Structure:
Chemical Name:
4'-BROMO-3'-METHYLACETANILIDE
CAS:
90914-81-1
MF:
C9H10BrNO
Structure:
Chemical Name:
N-Methylhydroxylamine hydrochloride
CAS:
4229-44-1
MF:
CH6ClNO
Structure:
Chemical Name:
2-Fluoro-3-nitrobenzoic acid
CAS:
317-46-4
MF:
C7H4FNO4
Structure:
Chemical Name:
3,4-Diaminobenzonitrile
CAS:
17626-40-3
MF:
C7H7N3
Structure:
Chemical Name:
2,3,5-Triiodobenzoic acid
CAS:
88-82-4
MF:
C7H3I3O2
Structure:
Chemical Name:
Methylaminoacetaldehyde dimethyl acetal
CAS:
122-07-6
MF:
C5H13NO2
Structure:
Chemical Name:
6-INDAZOLYBORONIC ACID
CAS:
885068-10-0
MF:
C7H7BN2O2
Structure:
Chemical Name:
2-Methoxyethyl acetoacetate
CAS:
22502-03-0
MF:
C7H12O4
Structure:
Chemical Name:
3-Mercaptopropyltriethoxysilane
CAS:
14814-09-6
MF:
C9H22O3SSi
Structure:
Chemical Name:
Methyl 3-amino-4-methoxybenzoate
CAS:
24812-90-6
MF:
C9H11NO3
Structure:
Chemical Name:
2-Phenylacetophenone
CAS:
451-40-1
MF:
C14H12O
Structure:
Chemical Name:
2,2'-Diaminodiphenyl disulphide
CAS:
1141-88-4
MF:
C12H12N2S2
Structure:
Chemical Name:
4-(2,4-DIMETHYLPHENYL)-3-THIOSEMICARBAZIDE
CAS:
66298-09-7
MF:
C9H13N3S
Structure:
Chemical Name:
3-Methylphenylacetic acid
CAS:
621-36-3
MF:
C9H10O2
Structure:
Chemical Name:
2-Acetylbenzoic acid
CAS:
577-56-0
MF:
C9H8O3
Structure:
Chemical Name:
(TRIMETHYLSILYL)DIAZOMETHANE
CAS:
18107-18-1
MF:
C4H10N2Si
Structure:
Chemical Name:
2-(3-Chlorophenoxy)-propionic acid
CAS:
101-10-0
MF:
C9H9ClO3
Structure:
Chemical Name:
Tetraoctylammonium bromide
CAS:
14866-33-2
MF:
C32H68BrN
Structure:
Chemical Name:
Phenylmethylsulfonyl fluoride
CAS:
329-98-6
MF:
C7H7FO2S
Structure:
Chemical Name:
Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide
CAS:
75980-60-8
MF:
C22H21O2P
Structure:
Chemical Name:
N-(1-Adamantyl)acetamide
CAS:
880-52-4
MF:
C12H19NO
Structure:
Chemical Name:
p-Acetylamino benzoic acid
CAS:
556-08-1
MF:
C9H9NO3
Structure:
Chemical Name:
BENZYL 1-PIPERAZINECARBOXYLATE
CAS:
31166-44-6
MF:
C12H16N2O2
Structure:
Chemical Name:
Trimethylacetic anhydride
CAS:
1538-75-6
MF:
C10H18O3
Structure:
Chemical Name:
4-(Trifluoromethyl)benzyl alcohol
CAS:
349-95-1
MF:
C8H7F3O
Structure:
Chemical Name:
2-(Trimethylsiloxy)-1,3-butadiene
CAS:
38053-91-7
MF:
C7H14OSi
Structure:
Chemical Name:
3,6-Dihydroxyphthalonitrile
CAS:
4733-50-0
MF:
C8H4N2O2
Structure:
Chemical Name:
1-(2-FURFURYL)-2-THIOUREA
CAS:
56541-07-2
MF:
C6H8N2OS
Structure:
Chemical Name:
Ethyl methacrylate
CAS:
97-63-2
MF:
C6H10O2
Structure:
Chemical Name:
4 4-DIMETHYLCYCLOHEXANONE 97
CAS:
4255-62-3
MF:
C8H14O
Structure:
Chemical Name:
Palmitoyl chloride
CAS:
112-67-4
MF:
C16H31ClO
Structure:
Chemical Name:
TERT-NONYL MERCAPTAN
CAS:
25360-10-5
MF:
C9H20S
Structure:
Chemical Name:
Tetracyanoethylene
CAS:
670-54-2
MF:
C6N4
Structure:
Chemical Name:
Nitroethane
CAS:
79-24-3
MF:
C2H5NO2
Structure:
Chemical Name:
9-Amino minocycline hydrochloride
CAS:
149934-21-4
MF:
C23H29ClN4O7
Structure:
Chemical Name:
n-Butyl fumarate
CAS:
105-76-0
MF:
C12H20O4
Structure:
Chemical Name:
DIPHENYLCARBAZONE
CAS:
538-62-5
MF:
C13H12N4O
Structure:
Chemical Name:
3,3'-Diamino-4,4'-dihydroxydiphenyl sulfone
CAS:
7545-50-8
MF:
C12H12N2O4S
Structure:
Chemical Name:
4-Ethoxybenzoic acid
CAS:
619-86-3
MF:
C9H10O3
Structure:
Chemical Name:
4-Methoxysalicylic acid
CAS:
2237-36-7
MF:
C8H8O4
Structure:
Chemical Name:
3-Bromophenylacetonitrile
CAS:
31938-07-5
MF:
C8H6BrN
Structure:
Chemical Name:
Monomethyl adipate
CAS:
627-91-8
MF:
C7H12O4
Structure:
Chemical Name:
4-(Methylmercapto)aniline
CAS:
104-96-1
MF:
C7H9NS
Structure:
Chemical Name:
2-Nitrophenylboronic acid
CAS:
5570-19-4
MF:
C6H6BNO4
Structure:
Chemical Name:
2-Fluoroethanol
CAS:
371-62-0
MF:
C2H5FO
Structure:
Chemical Name:
2-Hydrazinopyrazine
CAS:
54608-52-5
MF:
C4H6N4
Structure:
Chemical Name:
2,3-Dimethylhydroquinone
CAS:
608-43-5
MF:
C8H10O2
Structure:
Chemical Name:
4-Methyl-3-nitrophenylboronic acid
CAS:
80500-27-2
MF:
C7H8BNO4
Structure:
Chemical Name:
4-PYRIDINECARBOXAMIDINE
CAS:
33278-46-5
MF:
C6H7N3
Structure:
Chemical Name:
2-Ethoxyphenol
CAS:
94-71-3
MF:
C8H10O2
Structure:
Chemical Name:
2-(2-Bromoethyl)-1,3-dioxane
CAS:
33884-43-4
MF:
C6H11BrO2
Structure:
Chemical Name:
2-FLUORO-6-IODOBENZOIC ACID
CAS:
111771-08-5
MF:
C7H4FIO2
Structure:
Chemical Name:
Ethoxyethyne
CAS:
927-80-0
MF:
C4H6O
Structure:
Chemical Name:
1,3-DIHYDROXYNAPHTHALENE
CAS:
132-86-5
MF:
C10H8O2
Structure:
Chemical Name:
3-Butyn-2-one
CAS:
1423-60-5
MF:
C4H4O
Structure:
Chemical Name:
Quinoline-5-carboxylic acid
CAS:
7250-53-5
MF:
C10H7NO2
Structure:
Chemical Name:
Aminoguanidinium sulphate
CAS:
1068-42-4
MF:
CH6N4.H2O4S
Structure:
Chemical Name:
9-(Chloromethyl)anthracene
CAS:
24463-19-2
MF:
C15H11Cl
Structure:
Chemical Name:
3',5'-Difluoroacetophenone
CAS:
123577-99-1
MF:
C8H6F2O
Structure:
Chemical Name:
2,5-Dimethoxybenzoic acid
CAS:
2785-98-0
MF:
C9H10O4
Structure:
Chemical Name:
5-Fluoropyridin-3-ylboronic acid
CAS:
872041-86-6
MF:
C5H5BFNO2
Structure:
Chemical Name:
Ethyl (ethoxymethylene)cyanoacetate
CAS:
94-05-3
MF:
C8H11NO3
Structure:
Chemical Name:
Isocyanic acid 3,4-dichlorophenyl ester
CAS:
102-36-3
MF:
C7H3Cl2NO
Structure:
Chemical Name:
Citraconic anhydride
CAS:
616-02-4
MF:
C5H4O3
Structure:
Chemical Name:
(4-Isopropyl)thiophenol
CAS:
4946-14-9
MF:
C9H12S
Structure:
Chemical Name:
tert-Butyl acrylate
CAS:
1663-39-4
MF:
C7H12O2
Structure:
Chemical Name:
Carbon
CAS:
7440-44-0
MF:
C
Structure:
Chemical Name:
4-Fluorophenyl sulfone
CAS:
383-29-9
MF:
C12H8F2O2S
Structure:
Chemical Name:
4-AMINO-5-(4-PYRIDYL)-4 H-1,2,4-TRIAZOLE-3-THIOL
CAS:
36209-51-5
MF:
C7H7N5S
Structure:
Chemical Name:
4-Acetoxystyrene
CAS:
2628-16-2
MF:
C10H10O2
Structure:
Chemical Name:
Ethyl 3-hydroxybenzoate
CAS:
7781-98-8
MF:
C9H10O3
Structure:
Chemical Name:
Methyl 3-nitrobenzoate
CAS:
618-95-1
MF:
C8H7NO4
Structure:
Chemical Name:
5-FLUORO-2-METHOXYBENZALDEHYDE
CAS:
19415-51-1
MF:
C8H7FO2
Structure:
Chemical Name:
Adipoyl chloride
CAS:
111-50-2
MF:
C6H8Cl2O2
Structure:
Chemical Name:
2-Butoxyethyl acetate
CAS:
112-07-2
MF:
C8H16O3
Structure:
Chemical Name:
2-Chloro-4-nitrotoluene
CAS:
121-86-8
MF:
C7H6ClNO2
Structure:
Chemical Name:
4-Cyano-4'-pentylbiphenyl
CAS:
40817-08-1
MF:
C18H19N
Structure:
Chemical Name:
delta-Valerolactone
CAS:
542-28-9
MF:
C5H8O2
Structure:
Chemical Name:
2,4-Dimethyl-3-pentanone
CAS:
565-80-0
MF:
C7H14O
Structure:
Chemical Name:
2-Bromoethyl ethyl ether
CAS:
592-55-2
MF:
C4H9BrO
Structure:
Chemical Name:
4'-Chloropropiophenone
CAS:
6285-05-8
MF:
C9H9ClO