Xenon and krypton are both noble gases, but they should not be treated as interchangeable catalogue items. The process using the gas determines which contaminants matter, while the required quantity and route determine the practical cylinder arrangement. SG Trading reviews both products as compressed gas supplied in cylinders. Tube trailers are not offered as the standard supply format for xenon or krypton.
1. Begin with the application and acceptance basis
State what the gas will do in the receiving process. Lighting, glazing, plasma processing, laboratory work, detector systems and other technical applications can place different emphasis on moisture, oxygen, nitrogen, hydrocarbons or cross-contamination by another noble gas. An RFQ should name the application and identify any process-sensitive impurity instead of relying only on a grade label.
The acceptance basis should be an agreed product specification. A batch Certificate of Analysis then reports the analytical result for the supplied material. Typical data on a website helps structure the discussion but does not replace either document. The distinction is explained on the quality and documentation page.
2. Specify xenon grade and impurity limits
SG Trading publishes documented xenon profiles for Grade 5.0, Grade 5.5 and Grade 6.0. Their minimum xenon contents are 99.9990%, 99.9995% and 99.9999% respectively, with separate limits for individual impurities. Selecting the highest nominal purity is not automatically the most useful decision. The correct grade is the one whose individual limits fit the intended process and whose analytical method and batch evidence can be agreed.
If the enquiry concerns a xenon-containing mixture or an isotope, state the complete composition, tolerance, isotope requirement and regulatory context separately. A natural xenon specification must not be assumed to cover an enriched or radioactive isotope product.
3. Define krypton quality without guessing from xenon
A krypton request should state required krypton content and individual impurity limits directly. Do not infer krypton acceptance limits from a xenon table merely because both products are rare gases. Where the buyer has its own specification, attach it or reproduce the limits in the RFQ. Where no formal specification exists, provide the application, target grade and contaminants that could affect the process so that an appropriate commercial specification can be proposed.
4. Select the cylinder as part of the supply
The word cylinder is not a complete packaging specification. State the preferred water capacity, required product quantity, working or filling pressure, valve outlet, cylinder ownership and any material or cleanliness restriction. Also identify whether the buyer can receive a supplier-owned cylinder and how the empty package will be returned. Final filling quantity depends on the selected product, cylinder, pressure basis, applicable filling rules and agreed conditions.
Xenon and krypton are offered through cylinder-based enquiries. A bundle or tube trailer option should not be selected in the RFQ for these gases. The wider packaging overview explains why package type, valve, pressure and transport handling must be reviewed together.
5. State quantity and commercial units clearly
Provide both the required amount and the unit. If the buyer uses an internal unit or reference condition, explain it. A request for a number of cylinders without a target product quantity can be ambiguous because cylinder capacity and filling basis may differ. For repeat demand, add expected frequency and whether the quantity is a firm shipment requirement, a trial lot or an annual estimate.
6. Plan documents and international delivery
Typical requested records include the agreed specification, batch Certificate of Analysis, applicable SDS, cylinder records and shipment documents. State any certificate naming, language, legalization or consignee requirement before the offer is finalized. International delivery may be reviewed by air or sea, subject to cylinder acceptance, dangerous-goods rules, carrier conditions, destination, end use and trade-compliance review.
Gas, grade, individual impurity limits, quantity and unit, cylinder size, filling pressure, valve, tare ownership, application, destination, Incoterm, required date and required documents.
7. Keep the quotation product-specific
The final offer should identify one gas, one quality basis, one package and one delivery context. Availability, cylinder hardware, filling details, route and documentation are confirmed per enquiry. Submit the available facts through the structured RFQ; missing information can be clarified without replacing it with assumptions.
Related procurement guides cover neon supply and packaging and liquid helium ISO tank planning.