The acronym CAS has become synonymous with the unique identification number of a substance in biochemistry, and is equivalent to each chemical substance having its own "student number". Today, chemical databases are generally searchable by CAS number.
A CAS Registry Number (CAS Number, CAS Rn, CAS #), also known as a CAS registration number, is a unique numerical identification number for a substance (compound, polymer, biological sequences, mixture or alloy). .
A CAS number is divided into three parts by the hyphen "-", the first part has 2 to 6 digits, the second part has 2 digits, and the third part has 1 digit as a check digit. The CAS numbers are in ascending order and have no intrinsic meaning. The check digit is calculated as follows: multiply the last digit of the CAS number (the first and second digits) by 1, the second digit by 2, and so on, then add all the products, divide the sum by 10, and the remainder is the check digit of the third part. For example, the first two parts of the CAS number of H2O are 7732-18, then its check digit = ( 8×1 + 1×2 + 2×3 + 3×4 + 7×5 + 7×6 ) mod 10 = 105 mod 10 = 5 (mod is the remainder operator), so the CAS of the water is 7732-18-5.
I hope this helps you!
Question 2: What is the customs code for the following chemical? NADPH-cytochrome P450 reductase cytochrome P450 reductase
Customs code: 3507909000 Other enzyme products not listed in the number (all this number)
The first few are sure that they are chemical reagents? Or biochemical reagents
Question 3: In vitro diagnostic reagents charge code how to fill? The intended use is to control the accuracy and precision of the test reagents charge code and how to determine? "In vitro diagnostic reagents registration management" (State Food and Drug Administration Decree No. 5) Article 3: The in vitro diagnostic reagents referred to in this approach, refers to the management of in vitro diagnostic reagents according to the medical device, including in the prediction of disease, prevention, diagnosis, treatment monitoring, prognostic observation and health status evaluation process, used for in vitro testing of human samples reagents, kits, calibration products, quality control products. They can be used alone or in combination with instruments, apparatus, equipment or systems.
In vitro diagnostic reagents used for blood screening and in vitro diagnostic reagents labeled with radionuclides in accordance with the management of pharmaceuticals do not fall within the scope of management of these measures.
Article 17 According to the degree of risk of the product from low to high, in vitro diagnostic reagents are divided into the first category, the second category, the third category of products.
(A) the first category of products
1. Microbial culture media (not for microbial identification and drug sensitivity tests);
2. Sample processing products, such as hemolysate, diluent, staining solution and so on.
(B) the second category of products
In addition to the products that have been clearly identified as the first and third categories, the other is the second category of products, mainly including:
1. Reagents for protein testing;
2. Reagents for sugar testing;
3. Reagents for hormone testing;
4. Reagents for enzyme testing;
4. Reagents for enzyme testing;
5.
5. Reagents for ester detection;
6. Reagents for vitamin detection;
7. Reagents for inorganic ion detection;
8. Reagents for drug and drug metabolite detection;
9. Reagents for autoantibody detection;
10. Reagents for microbial identification or drug sensitivity test;
11. Reagents for microbial identification or drug sensitivity test;
12. Reagents for microbial identification or drug sensitivity tests;
11. Reagents for other physiological, biochemical or immune function indicators.
(C) the third category of products
1. Pathogenic pathogens and antigens, antibodies, and nucleic acids and other reagents related to the test;
2. Blood type, tissue mating reagents;
3. Reagents related to the detection of human genes;
4. Reagents related to hereditary diseases;
5, Reagents related to the detection of *** products, *** and toxic drugs for medical use;
6. Reagents related to the detection of therapeutic drug targets;
7. Reagents related to the detection of tumor markers;
8. Reagents related to the detection of allergic reactions (allergens).
Question 4: What is the meaning of CN number and UN number of the dangerous goods number? Dangerous Goods No.: Also known as Dangerous Goods No., CN No. (China DG Number, DG that is Dangerous Goods), is the "GB 12268-2012 Dangerous Goods List" of dangerous goods number. The Dangerous Goods Number of the Dangerous Chemicals List 2012 is the same as this one. The number consists of 5 *** numbers. The first digit indicates the category to which the dangerous goods belong according to this International Classification, the second digit indicates the category to which the dangerous goods belong according to this International Classification, and the third to fifth digits indicate the sequence number of the dangerous goods. According to this international classification, dangerous goods *** is divided into 9 categories and 23 items.UN No.: UN No. (United Nations Committee of Experts on the Transportation of Dangerous Goods No.), also known as the Dangerous Goods Transportation Number.
UN number: UN number (UN Committee of Experts on the Transport of Dangerous Goods number, also known as the dangerous goods transport number) is the number of the United Nations Committee of Experts on the Transport of Dangerous Goods on dangerous goods, UN is the abbreviation of the United Nations (the United Nations). UN number is registered in the United Nations Recommendations on the Transport of Dangerous Goods (Remendations on the Transport of Dangerous Goods).
Question 5: What is the customs code for chemical reagents? What are the formalities required for customs clearance? What is the process? The customs code of chemical reagents is mainly concentrated in Chapter 38 of the manual, and if it is a drug, there is also a part in Chapter 30. Therefore, the specific customs code should be defined according to the material, structure and use of the product you want to declare. Some chemical reagents are dangerous goods, and there are quite a lot of regulatory conditions. If you are not familiar with the rules of customs clearance, you can and Shenzhen Ludisda Supply Chain Company, cooperation, Ludisda, do import and export customs clearance, many years, customs clearance very quickly, but also to enterprises, advance foreign exchange payments.
Problem six: laboratory quality control report reagents with the code to write it Laboratory quality supervision, is an important part of internal quality assurance, is to ensure that the quality of laboratory products to meet the requirements of an important means of laboratory quality management is also a difficult point.
For testing laboratories, the results report is the final product of the laboratory. The accuracy and reliability of the results of the report, directly related to the interests of customers, but also related to the image and reputation of the laboratory. Therefore, to grasp the quality of laboratory supervision, but also to grasp the key aspects of laboratory management.
For laboratory quality supervision of the object, "testing and calibration laboratory capacity accreditation guidelines" CNAS / AC01-2006 pointed out that: "by the familiar with the testing and / or calibration of the methods, procedures, objectives and results of the evaluation of the personnel, testing and calibration of personnel, including employees in training, to carry out adequate monitoring "; "Appropriate supervision should be arranged for employees in training when they are used"; "When contracted personnel and other technicians and key support personnel are used, the laboratory should ensure that they are competent and supervised." Thus, testing laboratory supervision is primarily for testing personnel, including employees in training, contracted personnel, and other technicians.
How to carry out laboratory quality supervision, need to understand and do the following:
First, the form of quality supervision. Quality supervision work is generally carried out in the form of quality supervision network, quality supervision network by the quality of the person in charge, integrated management, testing department quality supervisor. Quality Supervisor selection of the main considerations: the number of supervisors, laboratories according to the detection of professional and technical areas involved, as long as they can meet the needs of the work, quality supervisors generally account for 10% of the number of professional and technical positions. Quality supervision is a technical work, the supervisor should be aware of the purpose of the test, familiar with the test methods, procedures, know the results of the evaluation of the personnel to bear, as far as professional knowledge is concerned, the requirements of its higher than the general test, verification personnel.
Second, the implementation of quality supervision. The implementation of quality supervision is mainly the preparation of relevant procedural documents, clear quality supervision of the division of responsibilities, quality supervision of work processes and requirements, quality supervision does not meet the work of processing and improvement opportunities. Formulate the annual quality supervision plan, which should include the way, project, frequency and requirements of supervision. The Integrated Management Department organizes the preparation of the supervision record sheet to document the supervision content. Supervision content covers the weak links in the operation of the management system in the previous year; set up columns for evaluation of testing activities, as well as for non-compliance with the testing work to put forward processing opinions. Supervisors implement the supervision according to the plan and record the content of activities in detail; the nonconformity and potential nonconformity found in accordance with the requirements of procedural documents, timely processing and feedback. Integrated Management Department to collect, summarize, analyze and evaluate the results of supervision, and as a management review of the contents of the input supervision record sheet.
Third, the way of quality supervision. Quality supervision mainly takes two ways, one is dynamic supervision that is, at any time, anywhere, in advance, without notice, on-site personnel to monitor the testing process, belonging to the daily supervision of the project, such as new entrants. Secondly, static supervision refers to the planned implementation of personnel testing process supervision, belonging to the special supervision of the project, such as customers have special requirements.
Fourth, the content of quality supervision. Quality supervision of the content of the whole process involves testing all aspects of the process, that is, from sampling or delivery of samples to the data and results issued by the whole process, in order to determine the quality of supervision of the content, including: evaluation, personnel qualifications and qualifications to maintain the test basis and test methods, instrumentation, equipment, facilities and environment, testing samples, reagents and consumable materials, sampling methods, safety and security and test reports.
Fifth, the evaluation of quality supervision. Quality supervision evaluation includes: whether the supervisor can verify the reliability of the test results; quality supervision of non-conformities found in a timely manner to take measures to deal with, whether the measures are effective; pre-quality supervision of the non-conformities found in the near future supervision of the re-occurrence of such content.
Question 7: cleaning agents, solvents, inks in the tax classification belongs to what Generally, you can enter the corresponding commodity keywords in the search to find the code library similar commodity classification for coding, and then select the correct tax rate to save.
The search keywords are as follows