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Standard

Standard Substance Protein assay reagent Titration standard Forensic and veterinary standards Analytical Standards Spectral Standards Chemistry Cosmetics Standard Volatile organic compounds (VOCs) Clinical Standards Veterinary drug and Pesticide residues Agricultural and environmental standards Chromatography Standards Life Science Standards Food and cosmetics standards Food and beverage standards Inorganic single element standard solution Pharmaceutical Impurity Reference Standards Water Testing Standards Organic Standard Solutions Organic Pollutant Standards Chinese medicine standards
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In the analysis work, it often demanded to apply high-quality compound with the exact content being accurate in order to be compared as the detection control or used to calibrate the instrument, the compound is known as standard sample.
Standard refers to the standard substance used for measuring the potency of biological products. When the production department submits to a higher authority for approval of the quality standard of the biological product, they should also provide the standard sample (indicated in unit (μ)) used for measuring the potency of the tested product.

According to different application, the verification products can be divided into biological standard for the testing of biological products, endocrine drugs, antibiotics and other bioassay and chemical standards including:
1 chemical standards used for calibration of the instrument;
2 chemical reference standards used for calibration of the ultraviolet or infrared spectrum of the drugs;
3 control standards used for the purity test of drugs as well as the impurity control or as the control standards for content determination of the medicine.

In the page 67 of the appendix in the People's Republic of China Pharmacopoeia 1990 1st edition, we can find hundreds kinds of standards including bornyl ester acetate, eugenol and panaxadiol as well as 39 kinds of control medicine for the purify inspection of traditional Chinese medicine, impurity control or the content determination.

International standards
This refers to standard sample, with the potency units of the existing international standard sample potency units as baseline, undergoing further calibration of its potency units on the basis of a wide range of international cooperation. Its potency is expressed in 1U. For a certain product, for the establishment of the first international standard sample, the determination of its potency units should be consulted and decided by the Committee of Experts before the announcement. The international standard is a standard reference substance for worldwide preparation of national standards, so that the international standards can achieve unity.

Reagents and standards
All reagents in the food analysis laboratories should be clearly labeled to indicate the following: 1 name; 2 the date of preparation; 3 Signature from the people in charge; 4 if necessary, we need to add content such as safety and validity and so on.
Most food analysis should use standard sample as reference for qualitative and quantitative determination. The standard sample should be classified according to the following classification methods: 1 international standard; 2 national standards; 3 internal standard; 4 other standards.
Receptacle for reference standards should be clearly affixed to the label, to indicate the following: 1 name; 2 standard document number; 3 Opening times; 4 Validity; 5 Signature.
In addition, the laboratory should keep all the necessary specific files for all the necessary reference standards.
Capacity analysis standard solution should also be strictly managed. It should be clearly posted on all the standard solution containers with labels to indicate: 1 name; 2 concentration; 3 formulation date; 4 No of formulated procedures; 5 storage conditions; 6 validity; 7 Signature from people in charge.

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Structure:
Chemical Name:
2-CHLORO-6-AMINO-9-(2',3',5'-TRI-O-ACETYL--D-RIBOFURANOSYL)PURINE
CAS:
79999-39-6
MF:
C16H18ClN5O7
Structure:
Chemical Name:
Amlodipine Impurity 22 (Z-Isomer)
MF:
C26H31ClN2O8S
Structure:
Chemical Name:
Amlodipine Impurity 28
CAS:
79781-21-8
MF:
C18H20ClNO5
Chemical Name:
Axitinib Impurity 16
Chemical Name:
Axitinib Impurity 22
Structure:
Chemical Name:
Imidazo[5,1-f][1,2,4]triazin-4(1H)-one, 2-[2-ethoxy-5-[(4-ethyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-5-methyl-7-propyl-
CAS:
448184-48-3
MF:
C23H32N6O5S
Chemical Name:
Cefminox Sodium impurity 5
Structure:
Chemical Name:
SORAFENIB N-OXIDE
CAS:
583840-03-3
MF:
C21H16ClF3N4O4
Structure:
Chemical Name:
Tolvaptan Impurity 35
CAS:
1316312-24-9
MF:
C10H10ClN
Chemical Name:
Erythromycin Impurity F
Chemical Name:
Apixaban Impurity 39
Chemical Name:
Aztreonam Impurity 1
Chemical Name:
Axitinib Impurity 1
Chemical Name:
Aprepitant Impurity 15
Structure:
Chemical Name:
Trelagliptin Impurity 17
CAS:
865759-02-0
MF:
C17H20BrFN4O2
Chemical Name:
Dapoxetine Impurity 1
CAS:
2825577-69-1
Chemical Name:
Regorafenib Impurity 15
Chemical Name:
Flomoxef Impurity 2
Chemical Name:
Varenicline Impurity 2
Chemical Name:
Topiroxostat Impurity 5
Chemical Name:
Everolimus Impurity 5
Chemical Name:
Ibrutinib Impurity 3
Chemical Name:
Canagliflozin Impurity 9
Structure:
Chemical Name:
Clopidogrel Impurity 14
MF:
C15H14ClNO2S
Chemical Name:
Febuxostat Impurity 53
Chemical Name:
Cefodizime Impurity C
Chemical Name:
Riociguat IMpurtiy F
Chemical Name:
Acrivastine Impurity 1
Structure:
Chemical Name:
Nifedipine impurity 10
CAS:
10323-98-5
MF:
C13H13NO3
Chemical Name:
Cefminox Sodium impurity E
Chemical Name:
Clindamycin Impurity D
Chemical Name:
Fasudil iMpurity C
Chemical Name:
Cefminox Impurity D
Chemical Name:
Ipragliflozin Impurity 6
Structure:
Chemical Name:
Ibrutinib Impurity 27
CAS:
2031255-26-0
MF:
C26H28N6O3
Structure:
Chemical Name:
Clopidogrel Impurity 59
CAS:
1122047-98-6
MF:
C25H26ClNO6S
Chemical Name:
Ozagrel Impurity B
Chemical Name:
Ceftriaxone Sodium impurity F
Structure:
Chemical Name:
(R)-5-(2-fluoro-3-methoxyphenyl)-1-(2-fluoro-6-(trifluoromethyl)benzyl)-6-methyl-3-(2-(2-oxopyrrolidin-1-yl)-2-phenylethyl)pyrimidine-2,4(1H,3H)-dione
CAS:
2248628-93-3
MF:
C32H28F5N3O4
Structure:
Chemical Name:
Famotidine EP Impurity I HCl
MF:
C8H15N7O2S3
Structure:
Chemical Name:
替扎尼定EP杂质C
CAS:
1147548-83-1
MF:
C16H14Cl2N10S2
Chemical Name:
nicergoline impurity Q
Structure:
Chemical Name:
Loratadine Impurity 19
CAS:
79779-58-1
MF:
C22H24N2O2
Structure:
Chemical Name:
(Z)-2-chloro-3-hydroxyacrylaldehyde
CAS:
50704-42-2
MF:
C3H3ClO2
Chemical Name:
(trans)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4''-fluoro-[1,1''-biphenyl]-4-yl)-1-methylpiperidine hydrochloride
Chemical Name:
Ticagrelor Related Compound 39
Chemical Name:
Erlotinib Impurity 32
Chemical Name:
Pramipexole Impurity 36
Chemical Name:
Teneligliptin Impurity 3
Chemical Name:
Erlotinib Hydrochloride iMpurity 52
Structure:
Chemical Name:
Ornidazole Impurity J
CAS:
742020-47-9
MF:
C7H12N4O3
Structure:
Chemical Name:
Daidzein-4′-glucoside
CAS:
58970-69-7
MF:
C21H20O9
Chemical Name:
Aprepitant iMpurity 45
Structure:
Chemical Name:
Afatinib Impurity 75
CAS:
2348580-72-1
MF:
C7H14N2O
Structure:
Chemical Name:
(R)-N-Glycidylphthalimide
CAS:
181140-34-1
MF:
C11H9NO3
Structure:
Chemical Name:
6-chloro-N-((1R,2S)-2-(3,4-difluorophenyl)cyclopropyl)-5- nitro-2-(propylthio)pyrimidin-4-amine
CAS:
1427523-93-0
MF:
C16H15ClF2N4O2S
Chemical Name:
Bendamustine Impurity 15
Chemical Name:
Bendamustine Related Impurity 10
Chemical Name:
Bortezomib Impurity 16
Structure:
Chemical Name:
Captopril Related Compound 8
CAS:
112243-88-6
MF:
C9H15NO3S
Chemical Name:
Edoxaban Impurity 25 (1R,2S,4R) Oxalate
Structure:
Chemical Name:
Ezetimibe Impurity 35
CAS:
1650568-82-3
MF:
C39H46F2N2O5Si2
Chemical Name:
Fosaprepitant Impurity 8
Structure:
Chemical Name:
9-(1,3-diacetate-2-propoxymethyl)guanine
CAS:
86357-19-9
MF:
C13H17N5O6
Structure:
Chemical Name:
Cefadroxil Impurity 6
CAS:
2378158-45-1
MF:
C32H32N6O9S2
Structure:
Chemical Name:
Loratadine Impurity 9
CAS:
125743-81-9
MF:
C22H23ClN2O2
Chemical Name:
Metronidazole Impurity 1
Structure:
Chemical Name:
Parecoxib Impurity 16
CAS:
2235371-89-6
MF:
C19H18N2O4S
Chemical Name:
Rosuvastatin Impurity 54
Structure:
Chemical Name:
Vonoprazan Fumarate Impurity 6
CAS:
2250243-23-1
MF:
C33H27F2N5O4S2
Structure:
Chemical Name:
3-((3aS,4R,6S,6aR)-6-(2-hydroxyethoxy)-2,2-dimethyltetrahydro- 4H-cyclopenta[d][1,3]dioxol-4-yl)-5-(propylthio)-3H-[1,2,3] triazolo[4,5-d]pyrimidin-7-ol
CAS:
1456538-51-4
MF:
C17H25N5O5S
Chemical Name:
Esomeprazole Impurity 24
Chemical Name:
Prasugrel Impurity 15
Structure:
Chemical Name:
Pregabalin Impurity 18
CAS:
1621171-19-4
MF:
C9H15NO2
Chemical Name:
Pregabalin Impurity 23
Structure:
Chemical Name:
Butylphthalide impurity
CAS:
16692-58-3
MF:
C12H14O2
Structure:
Chemical Name:
ethyl 2,5-dihydroxybenzenesulfonate
MF:
C8H10O5S
Structure:
Chemical Name:
5-ALLYLIDENE-10,11-DIHYDRO-5H-DIBENZO[A,D]CYCLOHEPTENE
CAS:
24755-73-5
MF:
C18H16
Structure:
Chemical Name:
tert-butyl (4-(benzyloxy)-8-methylnaphthalen-2-yl)carbamate
CAS:
1662687-76-4
MF:
C23H25NO3
Chemical Name:
Nintedanib Impurity 27
Structure:
Chemical Name:
ethyl 2-(2-formyl-3-hydroxyphenyl)-4-methylthiazole-5- carboxylate
MF:
C14H13NO4S
Structure:
Chemical Name:
LUMAT-004
CAS:
313544-31-9
MF:
C16H17N3O3
Structure:
Chemical Name:
Varenicline Impurity 3
CAS:
1333145-89-3
MF:
C14H15N3
Chemical Name:
Econazole Related Compound C (15 mg) (1-(4-Chlorobenzyl)-3-[(2RS)-2-[(4-chlorobenzyl)oxy]-2-(2,4-dichlorophenyl)ethyl]imidazolium chloride)
CAS:
57265-33-5
Structure:
Chemical Name:
Androstan-17-one,2,3-epoxy-16-(1-pyrrolidinyl)
CAS:
159325-45-8
MF:
C23H35NO2
Structure:
Chemical Name:
(2b,3a,16b,17b)-2,16-Bispiperidino-3,17-diacetoxy-5-androstane
CAS:
13529-31-2
MF:
C33H54N2O4
Structure:
Chemical Name:
Palbociclib Impurity 59
CAS:
1430196-98-7
MF:
C14H20N4O4
Chemical Name:
Landiolol impurity Z
Structure:
Chemical Name:
Vitamin K1 Impurity 1
CAS:
19274-66-9
MF:
C31H46O2
Chemical Name:
Teneligliptin Impurity 13
Structure:
Chemical Name:
Ceftazidime EP Impurity D
CAS:
73547-69-0
MF:
C45H44N6O7S2
Structure:
Chemical Name:
Nicergoline EP Impurity G
CAS:
57935-65-6
MF:
C23H24BrN3O2
Structure:
Chemical Name:
Benzenesulfonamide, 4-[5-(4-methylphenyl)-2-oxido-3-(trifluoromethyl)-1H-pyrazol-1-yl]-
CAS:
2356153-95-0
MF:
C17H14F3N3O3S
Structure:
Chemical Name:
2-Pyrrolidinecarbonitrile, 1-(2-aminoacetyl)-, hydrochloride (1:1), (2S)-
CAS:
913980-23-1
MF:
C7H12ClN3O
Structure:
Chemical Name:
Lamivudine Impurity 7
CAS:
147126-63-4
MF:
C14H24O4S
Structure:
Chemical Name:
EsCitalopram EP Impurity I
CAS:
1370643-22-3
MF:
C20H21FN2O
Structure:
Chemical Name:
(trans)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-methoxyphenyl)-1-methylpiperidine
CAS:
127017-42-9
MF:
C21H25NO4
Structure:
Chemical Name:
Methylprednisolone Impurity 21
CAS:
150899-33-5
MF:
C22H28O4
Structure:
Chemical Name:
Epinephrine Impurity 7
CAS:
62322-82-1
MF:
C9H11NO3
Structure:
Chemical Name:
(trans)-4-((2-amino-4,6-dibromobenzyl)amino)cyclohexanol
MF:
C13H18Br2N2O