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Proton

Also known as protium(1+)

CAS 12586-59-3Formula H+Molar mass 1.01 g/mol
Proton chemical structure, H+, CAS 12586-59-3
2D chemical structure

Key facts

What buyers check first

CAS number
12586-59-3
Formula
H+
Molar mass
1.01 g/mol
HS code
284443
Category
Isotope-labelled compounds

What is Proton?

Plain description, key identifiers and synonyms

Proton is nuclear particle of charge number +1, spin and rest mass of 1.007276470(12) u. It is a hydron and a nucleon.

Proton is a subatomic particle with positive charge.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
proton
CAS number
12586-59-3
Molecular formula
H+
InChIKey
GPRLSGONYQIRFK-FTGQXOHASA-N
InChI
InChI=1S/p+1/i/hH
Canonical SMILES
[H+]
Isomeric SMILES
[1H+]

Synonyms

  • protium(1+)

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
1.01 g/molcalc.
Exact mass
1.0073 Dacalc.
LogP (octanol/water)
0.11calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
0calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
1calc.
Stereocentres
0calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

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

Proton suppliers

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

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  • China, BeijingUnclaimed profile
    ProtonGrade, purity and minimum order on request
    Price on request
    View

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Where suppliers are based

1 supplier in 1 country

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Proton price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2844.43Indicative HS code

Radioactive elements and isotopes and compounds other than those of subheading 284410…

World exports in 2024
$2.19B
+8.8% vs 2023, imports $2.53B
2022 to 2024
Top exporters
  1. Canada32.1%
  2. Netherlands17.0%
  3. Germany11.4%
Top importers
  1. United States37.8%
  2. Germany8.4%
  3. China5.8%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Proton is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Proton?

Proton is nuclear particle of charge number +1, spin and rest mass of 1.007276470(12) u. It is a hydron and a nucleon.

What is the CAS number of Proton?

The CAS registry number of Proton is 12586-59-3.

What is the molecular formula and weight of Proton?

The molecular formula of Proton is H+ and its molar mass is 1.01 g/mol.

What is Proton used for?

Known uses and roles of Proton include isotope-labelled compounds in research and laboratory.

Is Proton hazardous?

No GHS hazard classification for Proton is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Proton?

Proton is usually classified under HS code 284443 (Radioactive elements and isotopes and compounds other than those of subheading 284410…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Proton?

CompoundList lists 1 supplier of Proton in China. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Proton?

Suppliers quote Proton 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 Proton

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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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