Analytical Chemistry

Analytical chemistry is the subject for the method and basic principle of studying and identifying of the composition, status, structure of matter as well as determination of related content. It is an important branch of chemistry subject. Analytical chemistry plays an important role in not only its own development but also in various fields related to the chemistry. We can say that all the practice of any human activity involving chemical phenomena is inseparable from analytical chemistry. Now, people have developed various kinds of different analytical methods, which can be classified based on an analysis task, analysis object, the basis of the analysis, requirement of the analysis and sample dosage.

According to the analysis tasks, it can be divided into qualitative analysis, quantitative analysis and structural analysis. Task of qualitative analysis is to identify the elements, radicals, functional groups or compounds that constituting the substances; the task of the quantitative analysis is to determine the content of the related components in the sample; the task of structural analysis is to study the molecular structure or crystal structure of the material.

(1) According to the analysis objects, it can be divided into organic and inorganic analysis; the object for the inorganic analysis is inorganic substance; the object of organic analysis is organic substance. In the inorganic analysis, it is generally required to determine what elements, ions, radicals or compounds that constitutes the sample and measure the percentage of each component; and sometimes it is also necessary for determination of the crystal structure; in the organic analysis, it not only requires the identification of the constituent elements, but also, more importantly, should do the structure analysis and functional group analysis.
(2) According to whether the analysis is based on the physical properties or chemical properties of the substance, it can be divided into instrumental analysis and chemical analysis. Depending on the specific requirements, it can be divided into routine analysis, rapid analysis and arbitration Analysis. Routine analysis refers to the general daily laboratory production analysis, also known as conventional analysis; rapid analysis is a kind of routine analysis and is mainly applied to the control of the production process, demanding the report of the results in the shortest possible time with the error generally being allowed to be greater; arbitration analysis is needed when there is controversy in the analysis results from different institute, demanding related department to conduct accurate analysis using specific method in order to determine the accuracy of the results of the original analysis.
(3) According to the amount of the sample, it can be generally divided into constant (> 0.1g), semi-micro (0.01 ~ 0.1g) and trace (1 ~ 10mg) analysis.
(4) In the inorganic qualitative chemical analysis, people generally apply semi-micro method while people generally apply constant analysis in the quantitative chemical analysis. According to the relative amounts of the analyzed components contained in the sample, it is also roughly divided into constant component analysis (> 1%), minor component analysis (0.01 to 1%) and trace components analysis (<0.01%). For the analysis of some trace amount of components contained in some kinds of complicated mixture and some substances, it is necessary to perform separation and enrichment. This produces a series of separation techniques, such as extraction, distillation, ion exchange, chromatography, sedimentation and flotation separation, these chemical separation techniques are an integral part of the analysis.

Environmental Analytical Chemistry
Environmental Analytical Chemistry is briefly referred to environmental analysis. It is a kind of subject to study the types, components of pollutants in the environment as well as how to perform qualitative and quantitative analysis on the chemical contaminants in the environment. It is a branch of environmental chemistry.

Environmental analytical chemistry emerged, developed and improved during the process of solving environmental problems. In 1950s, the public nuisance disease occurred in Japan had alerted the whole world. In order to find the cause of public nuisance disease, after experiencing as long as 11 years, later, the chemists of environmental analysis had applied light spectrum and identified that the river in Itai-itai disease area contained harmful elements such as lead, cadmium, arsenic and so on. Further by means of tracking element analysis of the soil and food in the disease area, people had found high lead and cadmium content. Later, people had further conducted spectral quantitative analysis on the body and bone of the patients in the disease area and found that the bone ashes contained alarmingly high content of zinc, lead and cadmium. To determine the causative agent, people further incorporated zinc, lead and cadmium into the food for feeding animals and conduct trace elemental analysis for animals and confirmed the serious harm of cadmium on the bone, revealing the cause of the Itai-itai disease. The development of modern science, especially the development of modern chemistry, physics, mathematics, electronics, biology, as well as the emergence of accurate, reliable, sensitive, selective, rapid, simple environmental pollution analysis technology and automation equipment, has been resulting in the maturation of environmental analytical chemistry. Environmental analytical chemistry now has penetrated into all areas of the entire environmental science subject. It is the most effective means of access to environmental information quality.
The objects of the environmental analytical chemistry research are quite complicated, including air, water, soil, sediment, minerals, waste, animals, plants, food, and human tissue. The content of chemical elements or compound to be determined in the environmental analytic chemistry is very low, with the absolute content being within the level of 10-6 to 10-12 grams.


The analysis technology in the environmental analytical chemistry is developing towards the direction of continuous automation, computerization and joint combination of various methods and instruments. Currently applied automatic analysis methods include colorimetric analysis, ion selective electrode, x-ray fluorescence spectroscopy, atomic absorption spectroscopy, polarography, gas chromatography, liquid chromatography and flow injection analysis. Laser, as the light source of analytical chemistry technique, has also been applied. Since the laser analysis has properties of high resolution, high sensitivity, long-range and short-term, the laser technology will play a pivotal role in the development of environmental analytical chemistry.

With the deepened development of environmental science, environmental analytical chemistry is often demanded for trace levels and ultra-trace-level detection and analysis, therefore, high sensitivity. Thus study of analysis methods of high sensitivity, good selectivity, rapid trace and ultra trace will become the major development direction for environmental analysis in the near future.

Qualitative Analysis of Chemistry
Qualitative analytic chemistry is the subject to identify the chemical elements and atoms groups contained in the sample. It is a branch subject of the analysis chemistry. Its purpose is to ascertain the chemical composition of the research object (specimen).
The major research content of the qualitative analytic chemistry includes:

1 the tested samples were analyzed separately. Namely take part of the sample and use exclusive reaction to detect a desire detection component.
2 systematic analysis of the samples. This means successively apply a few selective reactions for gradual separation of the ions followed by separation of each group until separating to only one substance and finally apply confirming reaction to ascertain the existence of this substance. The most famous cation system analysis method is H2S system. In recent years, due to the use of advanced equipment, qualitative analysis has also rapidly developed together with multivariate analysis and has also become an important direction for analytical chemistry.

Click on the specific product, view the latest prices of the products, information, serving information
Structure Chemical Name CAS MF
Penicillin EP  Impurity A Penicillin EP Impurity A
N-Desmethyl Clarithromycin N-Desmethyl Clarithromycin 101666-68-6 C37H67NO13
Ethacridine Impurity 10 Ethacridine Impurity 10 20304-71-6 C21H16N2O4
(S)-N-(1-Azabicyclo[2.2.2]oct-3-yl)-5,6,7,8-tetrahydro-1-naphthalenecarboxamide (S)-N-(1-Azabicyclo[2.2.2]oct-3-yl)-5,6,7,8-tetrahydro-1-naphthalenecarboxamide 135729-78-1 C18H24N2O
2-(2-(4-chlorobenzoyl)phenoxy)-2-methylpropanoic acid 2-(2-(4-chlorobenzoyl)phenoxy)-2-methylpropanoic acid
Olodaterol Impurity 31 Olodaterol Impurity 31
(S)-N-[(2S,4S,5S)-5-Amino-4-hydroxy-1,6-diphenylhexan-2-yl]-3-methyl-2-(2-oxotetrahydropyrimidin-1(2H)-yl)butanamide (S)-N-[(2S,4S,5S)-5-Amino-4-hydroxy-1,6-diphenylhexan-2-yl]-3-methyl-2-(2-oxotetrahydropyrimidin-1(2H)-yl)butanamide 192726-05-9 C27H38N4O3
2-Hydrazinoadenosine 2-Hydrazinoadenosine 15763-11-8 C10H15N7O4
Rocuronium Bromide Impurity 19 、21、22 Rocuronium Bromide Impurity 19 、21、22
Flucloxacillin impurity D Flucloxacillin impurity D
Ritonavir EP Impurity STU Ritonavir EP Impurity STU
Letermovir Impurity 1 Letermovir Impurity 1
Roxadustat Impurity 16 Roxadustat Impurity 16
Perospirone Impurity 19 Perospirone Impurity 19
Dolutegravir Impurity 14(Sodium Salt) Dolutegravir Impurity 14(Sodium Salt)
Fondaparinux sodium impurity 5 Fondaparinux sodium impurity 5
Fondaparinux sodium impurity 20 Fondaparinux sodium impurity 20
Piperacillin  Impurity R Piperacillin Impurity R
AMOXICILLIN TRIHYDRATE IMP. E (EP): (2RS,4S)-2-[[[(2R)-2-AMINO-2-(4-HYDROXYPHENYL)ACETYL]AMINO]METHYL]-5,5-DIMETHYLTHIAZOLIDINE-4-CARBOXYLIC ACID (PENILLOIC ACIDS OF AMOXICILLIN) AMOXICILLIN TRIHYDRATE IMP. E (EP): (2RS,4S)-2-[[[(2R)-2-AMINO-2-(4-HYDROXYPHENYL)ACETYL]AMINO]METHYL]-5,5-DIMETHYLTHIAZOLIDINE-4-CARBOXYLIC ACID (PENILLOIC ACIDS OF AMOXICILLIN)
4-CHLORO-7-(2-CHLORO-ETHOXY)-6-(2-METHOXY-ETHOXY)-QUINAZOLINE 4-CHLORO-7-(2-CHLORO-ETHOXY)-6-(2-METHOXY-ETHOXY)-QUINAZOLINE 183322-20-5 C13H14Cl2N2O3
METHYL 2-(O-NITROBENZYLIDENE)-ACETOACETATE METHYL 2-(O-NITROBENZYLIDENE)-ACETOACETATE 39562-27-1 C12H11NO5
Sugammadex sodium Impurity 48 Sugammadex sodium Impurity 48
Sugammadex sodium Impurity 47 Sugammadex sodium Impurity 47
Tenofovir Impurity 95 Tenofovir Impurity 95 1884329-63-8 C8H10BrN5
Tenofovir Impurity 117 Tenofovir Impurity 117 1643116-22-6 C8H11N5O
Tafluprost Impurity E Tafluprost Impurity E
Cabozantinib impurity 36 Cabozantinib impurity 36
Apigenin 7-O-(2'',6''-di-O-E-p-coumaroyl)glucoside Apigenin 7-O-(2'',6''-di-O-E-p-coumaroyl)glucoside 1448779-19-8 C39H32O14
Dapoxetine impurity 69 Dapoxetine impurity 69
4-FLUORO-2-METHYLBENZAMIDE 4-FLUORO-2-METHYLBENZAMIDE 886501-45-7 C8H8FNO
Tegoprazan Impurity 14 Tegoprazan Impurity 14
Nirmatrelvir Impurity 7 Nirmatrelvir Impurity 7
4(1H)-Pyridinone, 2-(hydroxymethyl)-3,5-dimethyl- (9CI) 4(1H)-Pyridinone, 2-(hydroxymethyl)-3,5-dimethyl- (9CI) 220757-73-3 C8H11NO2
Lasmiditan Impurity 6 Lasmiditan Impurity 6
1-methylpyrrolidin-3-yl 2-(4-chlorophenyl)-2-cyclopentyl- 2-hydroxyacetate hydrochloride 1-methylpyrrolidin-3-yl 2-(4-chlorophenyl)-2-cyclopentyl- 2-hydroxyacetate hydrochloride
Lasmiditan Impurity 8 Lasmiditan Impurity 8
1-methyl-4-(2-methyl-10H-benzo[b]thieno[2,3-e][1,4]diazepin-4-yl) piperazine 1-oxide dihydrate 1-methyl-4-(2-methyl-10H-benzo[b]thieno[2,3-e][1,4]diazepin-4-yl) piperazine 1-oxide dihydrate 2760465-02-7 C17H22N4O2S
Oseltamivir Impurity 126 Oseltamivir Impurity 126
2H-1,4-Benzoxazin-3(4H)-one, 6-hydroxy-8-[(1R)-1-hydroxy-2-[[2-(4-hydroxyphenyl)-1,1-dimethylethyl]amino]ethyl]-, hydrochloride (1:1) 2H-1,4-Benzoxazin-3(4H)-one, 6-hydroxy-8-[(1R)-1-hydroxy-2-[[2-(4-hydroxyphenyl)-1,1-dimethylethyl]amino]ethyl]-, hydrochloride (1:1) 936490-85-6 C20H25ClN2O5
Desacetylvinblastine hydrazide Desacetylvinblastine hydrazide 55383-37-4 C43H56N6O7
4-hydroxypyrrolidin-2-one 4-hydroxypyrrolidin-2-one 96820-00-7 C4H7NO2
glycopyrronium bromide glycopyrronium bromide 475468-09-8 C19H28NO3.Br
4'-hydroxyflurbiprofen 4'-hydroxyflurbiprofen 52807-12-2 C15H13FO3
D-biotin-d-sulfoxide D-biotin-d-sulfoxide 10406-89-0 C10H16N2O4S
3,4-dihydroxyphenylpyruvic acid 3,4-dihydroxyphenylpyruvic acid 4228-66-4 C9H8O5
Imimidistine impurity E Imimidistine impurity E
delta(3)-cefotiam delta(3)-cefotiam 142182-63-6 C18H23N9O4S3
anemonin anemonin 508-44-1 C10H8O4
alpha-(chloromethyl)-2-hydroxymethyl-5-nitroimidazole-1-ethanol alpha-(chloromethyl)-2-hydroxymethyl-5-nitroimidazole-1-ethanol 62580-79-4 C7H10ClN3O4
7-(deoxyadenosin-N(6)-yl)aristolactam I 7-(deoxyadenosin-N(6)-yl)aristolactam I 127191-86-0 C27H22N6O7
4-hydroxypenicillin V 4-hydroxypenicillin V 20880-67-5 C16H18N2O6S
BENAZEPRILAT BENAZEPRILAT 86541-78-8 C22H24N2O5
9-Methylene-9H-fluorene 9-Methylene-9H-fluorene 4425-82-5 C14H10
2-PIPERIDIN-4-YL-1H-BENZOIMIDAZOLE 2-PIPERIDIN-4-YL-1H-BENZOIMIDAZOLE 38385-95-4 C12H15N3
Benzenebutanoic acid, β-amino-2,5-difluoro-, (βR)- Benzenebutanoic acid, β-amino-2,5-difluoro-, (βR)- 936630-56-7 C10H11F2NO2
Cyclopropanecarboxylic acid, 1-[[(2-fluorophenyl)amino]carbonyl]- Cyclopropanecarboxylic acid, 1-[[(2-fluorophenyl)amino]carbonyl]- 918642-61-2 C11H10FNO3
Isavuconazole Impurity 34 Isavuconazole Impurity 34
Org246653-1(RRT0.31) Org246653-1(RRT0.31)
Linagliptin impurity Linagliptin impurity
CEFMETAZOLE IMPURITY CEFMETAZOLE IMPURITY 76952-82-4 C13H16N6O5S3
Acyclovir impurity R Acyclovir impurity R
Ornidazole Impurity 7 Ornidazole Impurity 7 109620-80-6 C6H8ClN3O3
(1R,2S,5aS,6aS,7aR,8aS,10aS) (1R,2S,5aS,6aS,7aR,8aS,10aS)
(E)-8-(3,4-dihydroxystyryl) (E)-8-(3,4-dihydroxystyryl)
N,N'-((2Z,2'Z)-disulfanediylbis N,N'-((2Z,2'Z)-disulfanediylbis
Cabozantinib impurity 1DYH Cabozantinib impurity 1DYH 1621681-63-7 C28H24FN3O6
1-((2R,3R)-3-(2,3-dihydrobenzo[b] 1-((2R,3R)-3-(2,3-dihydrobenzo[b] 2137145-62-9 C23H36N2O5
Tiotropium Bromide Impurity 1 Tiotropium Bromide Impurity 1 2109037-83-2 C18H20ClNO4S2
PREDNICARBATE IMPURITY F PREDNICARBATE IMPURITY F
2-Propanol, 1,1'-[methylenebis(4,1-phenyleneoxy)]bis[3-[(1-methylethyl)amino]- 2-Propanol, 1,1'-[methylenebis(4,1-phenyleneoxy)]bis[3-[(1-methylethyl)amino]- 1225195-70-9 C25H38N2O4
INDEX NAME NOT YET ASSIGNED INDEX NAME NOT YET ASSIGNED 2031272-32-7 C47H40N4O4
(4R,5S,6S)-3-[[(3S,5S)-1-[(4-Aminophenyl)methyl]-5-[[(3-carboxyphenyl)amino]carbonyl]-3-pyrrolidinyl]thio]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-Azabicyclo[3.2.0]hept-2-ene-2-carboxylic Acid Sodium Salt (4R,5S,6S)-3-[[(3S,5S)-1-[(4-Aminophenyl)methyl]-5-[[(3-carboxyphenyl)amino]carbonyl]-3-pyrrolidinyl]thio]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-Azabicyclo[3.2.0]hept-2-ene-2-carboxylic Acid Sodium Salt 866186-66-5 C29H33N4NaO7S
(R)-cis-5ξ-Methyl Atracurium Dibesylate (R)-cis-5ξ-Methyl Atracurium Dibesylate 1193104-82-3 C60H79N2O15S+
2-(((Z)-(1-(2-Aminothiazol-4-yl)-2-(((2R,3R)-2-methyl-4-oxo-1-sulfoazetidin-3-yl)amino)-2-oxoethylidene)amino)oxy)-2-methylpropanoic Acid 2-(((Z)-(1-(2-Aminothiazol-4-yl)-2-(((2R,3R)-2-methyl-4-oxo-1-sulfoazetidin-3-yl)amino)-2-oxoethylidene)amino)oxy)-2-methylpropanoic Acid C13H17N5O8S2
7-[4-[2-[[[4-(3-Carboxy-6-fluoro-1-methyl-4-oxo-1H,4H-[1,3]thiazeto[3,2-a]quinolin-7-yl)-1-piperazinyl]carbonyl]oxy]-3-oxobutyl]-1-piperazinyl]-6-fluoro-1-methyl-4-oxo-1H,4H-[1,3]thiazeto[3,2-a]quinoline-3-carboxylic acid 7-[4-[2-[[[4-(3-Carboxy-6-fluoro-1-methyl-4-oxo-1H,4H-[1,3]thiazeto[3,2-a]quinolin-7-yl)-1-piperazinyl]carbonyl]oxy]-3-oxobutyl]-1-piperazinyl]-6-fluoro-1-methyl-4-oxo-1H,4H-[1,3]thiazeto[3,2-a]quinoline-3-carboxylic acid 156834-58-1 C37H36F2N6O9S2
(6R,7S)-7-ACCA (6R,7S)-7-ACCA 108260-07-7 C7H7ClN2O3S
Enrofloxacin Impurity 1 Enrofloxacin Impurity 1 1128234-60-5 C19H22ClN3O3
Peramivir Impurity 20 Peramivir Impurity 20
Ambroxol Impurity 33 Ambroxol Impurity 33 199472-91-8 C13H20N2O
Bilastine Impurity 12 Bilastine Impurity 12 1638785-18-8 C30H42N4O3
Tadalafil Impurity 66 Tadalafil Impurity 66 1598416-07-9 C21H18N2O5
Peramivir Impurity 36 Peramivir Impurity 36
1-{[4-BENZYL-2-(3,4-DIMETHOXYPHENYL)-4H-CHROMEN-3-YL]METHYL}PIPERIDINIUM CHLORIDE 1-{[4-BENZYL-2-(3,4-DIMETHOXYPHENYL)-4H-CHROMEN-3-YL]METHYL}PIPERIDINIUM CHLORIDE C30H34ClNO3
4-Hydroxyisophthalonitrile 4-Hydroxyisophthalonitrile 34133-58-9 C8H4N2O
Empagliflozin Impurity 81 Empagliflozin Impurity 81
Iohexol Impurity M Iohexol Impurity M
Relugolix Impurity 18 Relugolix Impurity 18
Rabeprazole Impurity 15 Rabeprazole Impurity 15
4-((2-amino-2-oxoethyl)(hydroxy)amino)butanoic acid 4-((2-amino-2-oxoethyl)(hydroxy)amino)butanoic acid 2454698-45-2 C6H12N2O4
Lenvatinib Impurity LFZZ-8 Lenvatinib Impurity LFZZ-8 C44H40Cl2N8O8
Pemetrexed disodium Impurity 19 Pemetrexed disodium Impurity 19
Brivaracetam Impurity 32 Brivaracetam Impurity 32
Apixaban Impurity 56 Apixaban Impurity 56 2444918-46-9 C15H19N3O2
1-((2R,3R)-3-(4-(aminomethyl)thiazol-2-yl)-2-(2,5-difluorophenyl)-2-hydroxybutyl)-4-(1-((methyl(3-((2-(methylamino)acetoxy)methyl)pyridin-2-yl)carbamoyl)oxy)ethyl)-1H-1,2,4-triazol-4-ium chloride 1-((2R,3R)-3-(4-(aminomethyl)thiazol-2-yl)-2-(2,5-difluorophenyl)-2-hydroxybutyl)-4-(1-((methyl(3-((2-(methylamino)acetoxy)methyl)pyridin-2-yl)carbamoyl)oxy)ethyl)-1H-1,2,4-triazol-4-ium chloride
Ticagrelor Impurity 107 Ticagrelor Impurity 107
2-Thiazolamine, 5-bromo-4-(5-bromo-4-chloro-2-thienyl)- 2-Thiazolamine, 5-bromo-4-(5-bromo-4-chloro-2-thienyl)- 2401867-89-6 C7H3Br2ClN2S2
Carbamic acid, N-[1,1'-biphenyl]-2-yl-, 1-[2-[[4-(hydroxymethyl)benzoyl]methylamino]ethyl]-4-piperidinyl ester Carbamic acid, N-[1,1'-biphenyl]-2-yl-, 1-[2-[[4-(hydroxymethyl)benzoyl]methylamino]ethyl]-4-piperidinyl ester 1682660-39-4 C29H33N3O4
sodium 3-(4-((1H-imidazol-1-yl)methyl)phenyl)-3-hydroxypropanoate sodium 3-(4-((1H-imidazol-1-yl)methyl)phenyl)-3-hydroxypropanoate
(4S,6R)-((4R,6S)-6-(2-(tert-butoxy)-2-oxoethyl)-2,2-dimethyl-1,3-dioxan-4-yl)methyl 6-(2-(tert-butoxy)-2-oxoethyl)-2,2-dimethyl-1,3-dioxane-4-carboxylate (4S,6R)-((4R,6S)-6-(2-(tert-butoxy)-2-oxoethyl)-2,2-dimethyl-1,3-dioxan-4-yl)methyl 6-(2-(tert-butoxy)-2-oxoethyl)-2,2-dimethyl-1,3-dioxane-4-carboxylate
tert-butyl 2-(((Z)-(1-(2-aminothiazol-4-yl)-2-(((2S,3S)-2-methyl-4- oxoazetidin-3-yl)amino)-2-oxoethylidene)amino)oxy)-2-methyl propanoate tert-butyl 2-(((Z)-(1-(2-aminothiazol-4-yl)-2-(((2S,3S)-2-methyl-4- oxoazetidin-3-yl)amino)-2-oxoethylidene)amino)oxy)-2-methyl propanoate
HomePage | Member Companies | Advertising | Contact us | Previous WebSite | MSDS | CAS Index | CAS DataBase
Copyright © 2016 ChemicalBook All rights reserved.