CompoundList

Cyclooctyne

Also known as 1-Cyclooctyne, 1-Cyclooctyne #, Hydrazinecarboximidamide,2-(1-[1,1'-biphenyl]-4-ylethylidene)-, hydrochloride (1:1)

CAS 1781-78-8Formula C8H12Molar mass 108.18 g/mol
Cyclooctyne chemical structure, C8H12, CAS 1781-78-8
2D chemical structure

Key facts

What buyers check first

CAS number
1781-78-8
Formula
C8H12
Molar mass
108.18 g/mol
HS code
290219
Category
Hydrocarbons

What is Cyclooctyne?

Plain description, key identifiers and synonyms

Cyclooctyne is a cycloalkyne.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
cyclooctyne
CAS number
1781-78-8 CAS number cross-checked
Molecular formula
C8H12
UNII
35MR2L5G3W
InChIKey
ZPWOOKQUDFIEIX-UHFFFAOYSA-N
InChI
InChI=1S/C8H12/c1-2-4-6-8-7-5-3-1/h1-6H2
SMILES (canonical and isomeric)
C1CCCC#CCC1

Synonyms

  • 1-Cyclooctyne
  • 1-Cyclooctyne #
  • Hydrazinecarboximidamide,2-(1-[1,1'-biphenyl]-4-ylethylidene)-, hydrochloride (1:1)

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
108.18 g/molcalc.
Exact mass
108.0939 Dacalc.
LogP (octanol/water)
2.34calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
8calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.75calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, C1#CCCCCCC1

C1#CCCCCCC1

1 ring, 8 atoms. This chemical is the scaffold itself.

17 other chemicals share this scaffold

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.

Cyclooctyne suppliers

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

No supplier listings yet

Post one free request and suppliers who make or trade Cyclooctyne can send you quotes. Your contact details stay private until you accept a quote.

Cyclooctyne 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.

Get latest price

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 Cyclooctyne is traded under.

HS 2902.19Indicative HS code

Cyclanes, cyclenes and cycloterpenes, other

World exports in 2024
$979M
+24.3% vs 2023, imports $1B
2019 to 2024
Top exporters
  1. China23.4%
  2. United States20.6%
  3. Germany13.6%
Top importers
  1. India * partner reported9.9%
  2. United States9.8%
  3. South Korea9.5%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Cyclooctyne?

Cyclooctyne is a cycloalkyne.

What is the CAS number of Cyclooctyne?

The CAS registry number of Cyclooctyne is 1781-78-8.

What is the molecular formula and weight of Cyclooctyne?

The molecular formula of Cyclooctyne is C8H12 and its molar mass is 108.18 g/mol.

What is Cyclooctyne used for?

Known uses and roles of Cyclooctyne include building blocks in research and laboratory.

Is Cyclooctyne hazardous?

No GHS hazard classification for Cyclooctyne 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 Cyclooctyne?

Cyclooctyne is usually classified under HS code 290219 (Cyclanes, cyclenes and cycloterpenes, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Cyclooctyne?

Post a free request on CompoundList and suppliers of Cyclooctyne will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Cyclooctyne?

Suppliers quote Cyclooctyne 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 Cyclooctyne

Get quotes for Cyclooctyne

Post one free request with your grade, quantity and destination. Matching suppliers send quotes you can compare side by side.
Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
Embed this structure on your websiteShow code

Paste this code into your page to show the 2D structure of Cyclooctyne with a 3D view, its CAS number where known and a link back to this page. Free to use with the link kept.

<iframe src="https://www.compoundlist.com/embed/structure/cyclooctyne-1781-78-8" title="Cyclooctyne structure on CompoundList" width="360" height="420" style="border:1px solid #E7E2DA;border-radius:12px;max-width:100%" loading="lazy" referrerpolicy="strict-origin-when-cross-origin"></iframe>
Preview the embed

Explore more in Hydrocarbons or HS code 290219

Price on request
Free quotes, contact stays private
Get quotes