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FAQ about Product
About product handling
- 1. How can I find the storing methods of the purchased product and its stability?
- 2. What temperature should the products be kept at?
- 3. What is the expiry date?
- 4. Why the products have not been kept cool during transport although it is recommended for those products to be refrigerated or frozen?
- 5. Why is there sometimes no crystallisation even if stored at temperatures below the melting point?
- 6. The product is clumping in the container, is this a problem?
- 7. This product I bought was liquid, why it is solid now?
- 8. Why is the color so different between the same product?
- 9. How should I dispose of unnecessary reagents?
- 10. Is there any recommended protective equipment?
1. How can I find the storing methods of the purchased product and its stability?
Storing way of reagents is described as “Store Under Inert Gas” and “Condition to Avoid” in the “General Information” tab on the product details page. We recommend storing the product under appropriate conditions to maintain quality.
Since the product is intended for short-term use, its long-term storage capability and stability have not been verified. Upon receipt of the product, use it up as soon as possible.
Since the product is intended for short-term use, its long-term storage capability and stability have not been verified. Upon receipt of the product, use it up as soon as possible.
2. What temperature should the products be kept at?
"Storage Temperature" in the “General Information” tab on the product details page is indicated as room temperature (15-25°C), room temperature (cool and dark place below 15°C recommended), refrigerated (0-10°C), frozen (< 0°C), frozen (-20°C), frozen (-80°C).
Please use up the product as soon as possible, even under the storage temperatures listed.
3. What is the expiry date?
With the exception of some products, we do not set expiration dates or guarantee periods.
This is due to the fact that reagents may change over time unintentionally due to storage conditions or the presence of very small amounts of impurities, making it difficult to set a strict expiration date. After receiving the product, please use it up within a short period of time as much as possible.
In case of document accompanying the product informs expiration date or recommended expiration date is indicated, please use the product as indicated.
This is due to the fact that reagents may change over time unintentionally due to storage conditions or the presence of very small amounts of impurities, making it difficult to set a strict expiration date. After receiving the product, please use it up within a short period of time as much as possible.
In case of document accompanying the product informs expiration date or recommended expiration date is indicated, please use the product as indicated.
4. Why the products have not been kept cool during transport although it is recommended for those products to be refrigerated or frozen?
This is because the temperature conditions during storage and transportation are not necessarily the same. Only products for which a temporary rise in temperature during transportation could significantly affect quality are eligible for cold storage and transportation.
5. Why is there sometimes no crystallisation even if stored at temperatures below the melting point?
Due to supercooling, the product may be in a liquid phase even below the melting point. A slight stimulation may cause solidification. *The container may break when chilled, so please put it in a plastic bag before chilling.
6. The product is clumping in the container, is this a problem?
There is no particular problem in terms of quality.
Some products are difficult to commercialize in powder form. For example, products with a melting point close to room temperature are difficult to crystallize, and even if they are powdered in a pulverizer, the heat generated during pulverization will melt them.Therefore, it must be melted and divided into small portions as a liquid when the product is manufactured, but it may solidify into a lump when you receive it. Even if the product is made as a powder, it may melt and solidify into a lump depending on the storage temperature.
In this case, please melt it completely at a temperature 10 to 20°C above the melting point before use. If the product is used without completely melting it, there may be a difference in quality.
The method of melting varies depending on the product, but it should be done in a warm storage room or water bath.
Some products are difficult to commercialize in powder form. For example, products with a melting point close to room temperature are difficult to crystallize, and even if they are powdered in a pulverizer, the heat generated during pulverization will melt them.Therefore, it must be melted and divided into small portions as a liquid when the product is manufactured, but it may solidify into a lump when you receive it. Even if the product is made as a powder, it may melt and solidify into a lump depending on the storage temperature.
In this case, please melt it completely at a temperature 10 to 20°C above the melting point before use. If the product is used without completely melting it, there may be a difference in quality.
The method of melting varies depending on the product, but it should be done in a warm storage room or water bath.
7. This product I bought was liquid, why it is solid now?
Compounds may change state depending on temperature. First, please check the melting point listed in the SDS or other documents. (Various documents such as SDS can be downloaded from “Product Document Search”. If there is a 2D code sticker attached to the cap of the product container, you can scan it to view the various documents).
In case of compound which melting point is between 0 and 45°C, they may become liquid in summer and solid in winter. Some compounds are liquid in a supercooled state, and crystallization may occur due to external factors such as impact.
The quality of the product is not affected by the change in state.
In case of compound which melting point is between 0 and 45°C, they may become liquid in summer and solid in winter. Some compounds are liquid in a supercooled state, and crystallization may occur due to external factors such as impact.
The quality of the product is not affected by the change in state.
8. Why is the color so different between the same product?
The color tones of compounds are easily affected by the slight environmental influences, and color differences may occur from lot to lot, even in the same product. Some compounds, such as nitrogen-containing compounds, are prone to discoloration, but this does not affect the quality of the product.
The original color is described as “Appearance” in the “Specifications” section of the “Specifications & Properties” tab on the product details page. If a two-dimensional code sticker is attached to the cap of the product container, the specifications document can be viewed by scanning it.
The original color is described as “Appearance” in the “Specifications” section of the “Specifications & Properties” tab on the product details page. If a two-dimensional code sticker is attached to the cap of the product container, the specifications document can be viewed by scanning it.
9. How should I dispose of unnecessary reagents?
Please dispose of unnecessary reagents in accordance with the rules of your local government, and refer to the "DISPOSAL CONSIDERATIONS" in the SDS.
Disposal should always be performed by or under the full guidance of a person in charge with expertise in the field.
Please contact the industrial waste disposal contractor directly for information about the appropriate disposal method and outsourcing. Please understand that we are not the vendor concerned and cannot accept the request.
Disposal should always be performed by or under the full guidance of a person in charge with expertise in the field.
Please contact the industrial waste disposal contractor directly for information about the appropriate disposal method and outsourcing. Please understand that we are not the vendor concerned and cannot accept the request.
10. Is there any recommended protective equipment?
Please select the appropriate protective equipment for the job.
For absorbent cans for gas masks, please select one based on the data (compatible gases, breakthrough curve diagram) of the absorbent can manufacturer, taking into consideration not only the chemical substance to be handled but also the reaction gases generated in synthesis, etc.
Please note that depending on the concentration in the work atmosphere and the duration of the work, there may be cases where a gas mask is not appropriate, but an air-supplied or self-contained mask may be required.
Please note that depending on the concentration in the work atmosphere and the duration of the work, there may be cases where a gas mask is not appropriate, but an air-supplied or self-contained mask may be required.
About containers
- 11. What type of containers are used for reagent products?
- 12. How do I use a gas cylinder?
- 13. How do I open the ampoule container and store it after opening?
- 14. How do I open the septum container and what are the precautions for use?
- 15. How do I use a vial container?
- 16. What is the purpose of the 2D code sticker on the top surface of the product container cap?
- 17. Is the barcode on the product label a JAN code?
11. What type of containers are used for reagent products?
We have reagent containers variety of shapes and materials, and they are selected to suit the properties and application of each reagent to maintain quality and safety. For more information, please refer to the "Packaging and Containers" page.
For products that use special containers, the type of containers are listed in the basic information on each product detail page.
*Please note that container types are subject to change without notice.
For products that use special containers, the type of containers are listed in the basic information on each product detail page.
*Please note that container types are subject to change without notice.
12. How do I use a gas cylinder?
To use gas cylinder, a charge valve and a pipe connector must be purchased (both are sold separately).
Please refer to "Gas Cylinders” page for the details on how to set these up a cylinder.
[Related Products]
Charge valve: Product number V0030
Connectors (used to connect the reactor to the gas cylinder)
Tube Connector (for normal pressure): Product number V0070
Pipe Connector (for pressurization): Product number V0071
Please refer to "Gas Cylinders” page for the details on how to set these up a cylinder.
[Related Products]
Charge valve: Product number V0030
Connectors (used to connect the reactor to the gas cylinder)
Tube Connector (for normal pressure): Product number V0070
Pipe Connector (for pressurization): Product number V0071
13. How do I open the ampoule container and store it after opening?
There are three types of ampoule containers which have point marks or lines on them, and each type needs different way to open. Please refer to the "How to Open Ampule Containers" page to open the ampoule.
Please refrain from storing the product after opening the package and use it up as soon as possible.
Some products in ampoule containers react easily with moisture and oxygen in the air, some have a low boiling point and are highly volatile, and some have a strong odor. Transferring to another container after opening may cause unexpected accidents such as fire or poisoning, and quality deterioration, since the container cannot be sealed as tightly as an ampoule.
Please refrain from storing the product after opening the package and use it up as soon as possible.
Some products in ampoule containers react easily with moisture and oxygen in the air, some have a low boiling point and are highly volatile, and some have a strong odor. Transferring to another container after opening may cause unexpected accidents such as fire or poisoning, and quality deterioration, since the container cannot be sealed as tightly as an ampoule.
14. How do I open the septum container and what are the precautions for use?
The syringe used to remove the reagent should be a fine needle. A needle with a balloon filled with an inert gas such as argon or nitrogen should also be used when removing the reagent.
The septum cap is closed with strong force to ensure a tight seal. The septum cap should only be opened when the reagent is used up in a single opening or when disposing of the reagent. When removing the septum cap from the bottle, we recommend the use of a tool such as the designated cap opener or water pump pliers.
Details on how to open the septum container and precautions are provided on the"DualSeal" page.
Please read it carefully to maintain the quality of our products.
The septum cap is closed with strong force to ensure a tight seal. The septum cap should only be opened when the reagent is used up in a single opening or when disposing of the reagent. When removing the septum cap from the bottle, we recommend the use of a tool such as the designated cap opener or water pump pliers.
Details on how to open the septum container and precautions are provided on the"DualSeal" page.
Please read it carefully to maintain the quality of our products.
15. How do I use a vial container?
After removing the center portion of the aluminum seal, insert a syringe needle into the rubber lid and remove the reagent.Use a fine syringe needle, and needle with a balloon filled with an inert gas such as argon or nitrogen should also be used when removing the reagent.
When storing the product, cover it with Parafilm or similar material if it has an aluminum seal attached. If the aluminum seal has been removed, reattach the aluminum seal, or cover the rubber lid with Parafilm or similar material.
When storing the product, cover it with Parafilm or similar material if it has an aluminum seal attached. If the aluminum seal has been removed, reattach the aluminum seal, or cover the rubber lid with Parafilm or similar material.
16. What is the purpose of the 2D code sticker on the top surface of the product container cap?
By scanning the two-dimensional code, you can check the product's relevant documents with a single tap. Analytical charts, specifications, certificates of analysis, and safety data sheets (SDS) are available for easy download.
17. Is the barcode on the product label a JAN code?
The barcodes are designed by TCI own, and we do not use JAN codes.
About product documents and specifications
- 18. What are grades of products?
- 19. How do I know about analysis methods?
- 20. Where can I find documents related to your products, such as SDSs, specifications, certification of analysis, etc.?
- 21. Are there documents of specifications or certification of analysis for reference materials certified by the Japan Petroleum Institute or for food color by Food Sanitation Law in Japan?
- 22. Are analysis data provided for all products?
- 23. What are the letters of the alphabet in the top left-hand corner in the NMR spectrum chart?
- 24. I want to know what the Japanese says on the chromatography charts.
- 25. Does the product comply with official standards such as the Japanese Pharmacopoeia?
18. What are grades of products?
Some unique grades are determined for some products.
| Ace | Tokyo Kasei's special high quality analytical reagent |
| FC | Food Color by Food Sanitation Law in Japan |
| SG | For absorption spectrophotometric analysis |
| SU | For special applications |
| UP | Zone purified (purified by the zone purification method, and the zone number is indicated when the product reaches a steady state) |
[About GR (Tokyo Kasei Special Grade) and EP (Tokyo Kasei Grade 1) ]
These two grades were determined before 2019 and have been discontinued. The decision was based on the judgment that the distinction is no longer necessary due to improvements in the quality of ungraded products. Please use our products with confidence, as we guarantee the quality of each product based on its specification.
The specifications of each product are reviewed from time to time and are subject to change or deletion without notice. Please check the product detail page for the latest information.
19. How do I know about analysis methods?
Analysis methods of the product are shown in the “Specifications” section of the “Specifications & Properties” tab on the product details page. If a two-dimensional code sticker is attached to the cap of the product container, the specifications document can be viewed by scanning it.
Commonanalysis methods are GC - Gas chromatography; HPLC - High Performance Liquid Chromatography; Titration; Neutralization Titration and Non-aqueous Titration, etc.
Commonanalysis methods are GC - Gas chromatography; HPLC - High Performance Liquid Chromatography; Titration; Neutralization Titration and Non-aqueous Titration, etc.
20. Where can I find documents related to your products, such as SDSs, specifications, certification of analysis, etc.?
The PDF files of the documents can be downloaded on "Product Document Search" page or “Documents” section at the bottom of each product detail page.
You can also scan the two-dimensional code sticker attached to the product container cap and view it from the dedicated web page displayed.
You can also scan the two-dimensional code sticker attached to the product container cap and view it from the dedicated web page displayed.
21. Are there documents of specifications or certification of analysis for reference materials certified by the Japan Petroleum Institute or for food color by Food Sanitation Law in Japan?
Reference materials certified by the Japan Petroleum Institute and food color by Food Sanitation Law in Japan are analyzed by specialized organizations. TCI does not issue our own documents such as specifications or certification of analysis because we sell the products that have passed their analysis in their original seals.
22. Are analysis data provided for all products?
Currently, the analysis charts available on our website are limited to some products. We are expanding the number of products that analytical charts are available, but you may not be able to find them even if you search for them.
We may be able to provide analysis charts and disclose analysis conditions even for products that were not available on our website.
Please contact us if you want to make a request. Please note that we may not be able to meet your request.
We may be able to provide analysis charts and disclose analysis conditions even for products that were not available on our website.
Please contact us if you want to make a request. Please note that we may not be able to meet your request.
23. What are the letters of the alphabet in the top left-hand corner in the NMR spectrum chart?
Alphabets or words may be found in the upper left corner of the NMR spectrum chart.
| W | Double tube |
| AL | Alumina dehydration |
| SOON | Prepared just before using |
| HOT | Dissolved by heating |
24. I want to know what the Japanese says on the chromatography charts.
There are some cases when a chromatography chart may contain text in Japanese. We apologize for the inconvenience, please see the following pages which show examples of the English translation:
25. Does the product comply with official standards such as the Japanese Pharmacopoeia?
Our analysis methods and specifications are unique to TCI. Since we sometimes refer to the Japanese Pharmacopoeia or JIS, the results may be similar eventually.
Other questions about products
- 26. Where can lot numbers be found?
- 27. What are the items listed on the label?
- 28. Can I have information about impurities in your products?
- 29. Can these products be used for purposes such as food additives or pharmaceuticals?
- 30. Is it possible to disclose information about manufacturing methods and raw materials?
- 31. Is it possible to provide a list of product data for a reagent management system?
26. Where can lot numbers be found?
Lot numbers can be found on the right side of the TCI logo on the product label.
Lot numbers are a random combination of 5-digit alphanumeric characters. Please note that the numbers connected by "-" (hyphen) are control numbers, which are different from lot numbers.
See also the "Product Labels" page.
Lot numbers are a random combination of 5-digit alphanumeric characters. Please note that the numbers connected by "-" (hyphen) are control numbers, which are different from lot numbers.
See also the "Product Labels" page.
27. What are the items listed on the label?
The figure below is a sample product label. Please refer to the"Product Labels" page for details on each item.
28. Can I have information about impurities in your products?
We analyze reagent product by only items in specifications, and we do not detect and determine for specific impurities in products.
29. Can these products be used for purposes such as food additives or pharmaceuticals?
With the exception of products for which such usage is specifically noted including Food Color by Food Sanitation Law in Japan (our company’s product grade for such products is FC) and basic ingredients for pharmaceuticals (mainly chemical products), reagents and chemical products included in the catalog cannot be used for purposes other than experiments or research and should not be used as pharmaceuticals, quasi-pharmaceuticals, cosmetics, agricultural chemicals, insecticides, food additives or chemical agents for domestic use. TCI bears no responsibility for compensating any accidents or injuries resulting from mistaken use of our products.
Please refer to the "General Safety Handling Consideration" page for the range of applications.
Please refer to the "General Safety Handling Consideration" page for the range of applications.
30. Is it possible to disclose information about manufacturing methods and raw materials?
Information related to manufacturing (raw materials, manufacturing methods, manufacturing dates and some analytical conditions, etc.) is confidential. Please understand that we are unable to disclose such information upon request.
31. Is it possible to provide a list of product data for a reagent management system?
This service can be provided free of charge. For details on how to apply, please contact us.