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Metals, alloys and elements

Krypton

Also known as Krypton, compressed, KR, cripton

CAS 7439-90-9Formula KrMolar mass 83.80 g/molEC 231-098-5
GHS signal word: Warning. Pictograms: Gas under pressure 9 suppliers listed
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Element with atomic number and standard atomic weight

Key facts

What buyers check first

All properties
Physical form
Gas
Melting point
-157 °C
Boiling point
-153 °C
Density
2.89 @25 °C
Solubility
Solubility in water: none
HS code
280429
Category
Metals, alloys and elements
UN number
UN 1056
Illustrative photo, a small gas cylinder with a regulator in a lab on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Krypton?

Plain description, key identifiers and synonyms

Krypton atom is a noble gas atom and a p-block element atom. It has a role as a NMR chemical shift reference compound.

Krypton is a chemical element with symbol Kr and atomic number 36, rare gas.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
krypton
CAS number
7439-90-9 CAS number cross-checked
EC number
231-098-5
Molecular formula
Kr
UNII
5I8I620HVX
InChIKey
DNNSSWSSYDEUBZ-UHFFFAOYSA-N
InChI
InChI=1S/Kr
SMILES (canonical and isomeric)
[Kr]

Synonyms

  • Krypton, compressed
  • KR
  • cripton
  • krypton atom
  • Krypton84
  • krypton hydride
  • Krypton element
  • Atomic Krypton
  • Element Krypton
  • Element:Krypton
  • Element-Kr
  • Element:Kr
  • Krypton (atomic)
  • Kr (element)
  • Krypton (element)
  • krypton(0)
  • Krypton, elemental
  • [Kr]
  • 36Kr
  • Krypton, >=99.998%
  • Krypton, Messer(R) CANGas, 99.99%
  • Krypton, refrigerated liquid (cryogenic liquid)
  • Krypton, compressed [UN1056] [Nonflammable gas]
  • Krypton, refrigerated liquid (cryogenic liquid) [UN1970] [Nonflammable gas]

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Physical form
Gasexp.
Melting point
-157 °Cexp.
Boiling point
-153 °Cexp.
Density
2.89 @25 °Cexp.
Solubility
Solubility in water: noneexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
83.80 g/molcalc.
Exact mass
83.9115 Dacalc.
LogP (octanol/water)
0calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
1calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS04: Gas under pressure
Gas under pressure

Hazard statements

  • H280Contains gas under pressure, may explode if heated.
  • H281Contains refrigerated gas, may cause cryogenic burns or injury.
Precautionary statements (4)
  • P282Wear cold insulating gloves and either face shield or eye protection.
  • P336 + P317Thaw frosted parts with lukewarm water. Do not rub affected area. Get medical help.
  • P403Store in a well-ventilated place.
  • P410 + P403Protect from sunlight. Store in a well-ventilated place.
UN number
UN 1056
Transport hazard class
2.2

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Krypton suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 9 suppliers
9 of 9 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

9 suppliers in 6 countries

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Krypton price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Roles

  • NMR chemical shift reference compound
  • reference compound

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Krypton is traded under.

HS 2804.29Indicative HS code

Rare gases, other

World exports in 2024
$2.36B
−6.0% vs 2023, imports $2.46B
2019 to 2024
Top exporters
  1. Qatar * partner reported34.3%
  2. United States22.9%
  3. Algeria * partner reported6.8%
Top importers
  1. China17.8%
  2. South Korea12.7%
  3. Germany9.4%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Krypton is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Krypton, based on the data on this page

What is Krypton?

Krypton atom is a noble gas atom and a p-block element atom. It has a role as a NMR chemical shift reference compound.

What is the CAS number of Krypton?

The CAS registry number of Krypton is 7439-90-9.

What is the molecular formula and weight of Krypton?

The molecular formula of Krypton is Kr and its molar mass is 83.80 g/mol.

What is Krypton used for?

Known uses and roles of Krypton include specialty gases in electronics and semiconductors, nmr chemical shift reference compound and reference compound.

Is Krypton hazardous?

Krypton carries the GHS signal word "Warning". Main hazards: contains gas under pressure, may explode if heated, contains refrigerated gas, may cause cryogenic burns or injury. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Krypton?

Krypton is usually classified under HS code 280429 (Rare gases, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Krypton?

CompoundList lists 9 suppliers of Krypton in China, France, India, Romania and 2 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Krypton in India?

1 supplier in India list Krypton on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Krypton?

Suppliers quote Krypton on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Krypton

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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