What is N-Butyl Cyanoacrylate CAS 6606-65-1?

N-Butyl Cyanoacrylate, also called n-butyl 2-cyanoacrylate or NBCA, is a cyanoacrylate monomer with the formula C8H11NO2. It polymerizes rapidly in the presence of trace moisture and is used as a raw material in fast-setting cyanoacrylate adhesive systems.

Is N-Butyl Cyanoacrylate supplied as a finished adhesive?

No. This industrial/formulation grade is supplied as a stabilized monomer for manufacturers to formulate into instant adhesives. It normally requires addition of stabilizers, thickeners, accelerators, or other additives before use as a finished bonding product.

How does N-Butyl Cyanoacrylate compare with methyl and octyl cyanoacrylates?

The butyl ester is a medium-chain cyanoacrylate. It generally sets faster and is more rigid than 2-octyl cyanoacrylate, but is less brittle and less aggressive than methyl or ethyl cyanoacrylate, making it a useful balance for many instant adhesive formulations.

Why is moisture control important for N-Butyl Cyanoacrylate?

Cyanoacrylate monomers undergo anionic polymerization when exposed to water, moisture, or weak bases. Sealed moisture-resistant packaging and low-humidity storage prevent premature polymerization, viscosity increase, or gelling before formulation.

What substrates can N-Butyl Cyanoacrylate bond?

Formulated adhesives based on this monomer are commonly used for plastics, rubber, and metal substrates in industrial assembly. Bond performance depends on the formulation, surface preparation, gap, and cure conditions, not on the monomer alone.

What are the typical physical properties of N-Butyl Cyanoacrylate?

It is a colorless to slightly yellow transparent liquid with a molecular weight of 153.18 g/mol and a density around 0.99 g/cm3 at 20°C. It has limited water solubility and is generally soluble in organic solvents used in adhesive formulation.

N-Butyl Cyanoacrylate (NBCA) CAS 6606-65-1

N-Butyl Cyanoacrylate, also called n-butyl 2-cyanoacrylate or NBCA, CAS 6606-65-1, is a reactive cyanoacrylate monomer supplied as a stabilized liquid and positioned for instant adhesive systems that cure rapidly in the presence of moisture. Confirm the required grade, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 6606-65-1
Synonyms: n-Butyl 2-cyanoacrylate; Butyl cyanoacrylate
Einecs: 229-551-7
Molecular Formula: C8H11NO2
Grade: Industrial / formulation grade (stabilized monomer)
Package: Moisture-protected liquid chemical packaging

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Product Description

N-Butyl Cyanoacrylate (NBCA) CAS 6606-65-1 is a cyanoacrylate monomer with EC 229-551-7 and molecular formula C8H11NO2.

Synonyms: n-Butyl 2-cyanoacrylate; Butyl cyanoacrylate.

CAS: 6606-65-1.

Molecular formula: C8H11NO2.

It is supplied as a colorless to slightly yellow transparent liquid.

It has a molecular weight of about 153.18 g/mol.

It is positioned as a reactive monomer for instant adhesive systems that cure in the presence of moisture.

It is used as a core monomer in fast-curing cyanoacrylate adhesive systems.

It is used for bonding plastics, rubber, and metal substrates in industrial assembly.

It is a medium-chain cyanoacrylate that sets faster than 2-octyl cyanoacrylate but is less brittle than methyl or ethyl cyanoacrylate.

It undergoes anionic polymerization when exposed to water, moisture, or weak bases.

Confirm the required industrial or formulation grade, stabilized monomer, appearance, and related specifications for the chosen grade.

Check compatibility with the target adhesive formulation and confirm additives such as stabilizers, thickeners, or accelerators are added before end use.

Store in a cool, dry, well-ventilated area, away from heat, moisture, and direct sunlight.

Keep containers tightly sealed and avoid contact with moisture and alkaline materials to prevent premature polymerization.

Confirm packaging suitable for the moisture-sensitive liquid form and order quantity, and follow the current SDS.

Confirm grade, packaging, and specification as required.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended application, required grade, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is N-Butyl Cyanoacrylate CAS 6606-65-1?

A: N-Butyl Cyanoacrylate, also called n-butyl 2-cyanoacrylate or NBCA, is a cyanoacrylate monomer with the formula C8H11NO2. It polymerizes rapidly in the presence of trace moisture and is used as a raw material in fast-setting cyanoacrylate adhesive systems.
Q:
Is N-Butyl Cyanoacrylate supplied as a finished adhesive?

A: No. This industrial/formulation grade is supplied as a stabilized monomer for manufacturers to formulate into instant adhesives. It normally requires addition of stabilizers, thickeners, accelerators, or other additives before use as a finished bonding product.
Q:
How does N-Butyl Cyanoacrylate compare with methyl and octyl cyanoacrylates?

A: The butyl ester is a medium-chain cyanoacrylate. It generally sets faster and is more rigid than 2-octyl cyanoacrylate, but is less brittle and less aggressive than methyl or ethyl cyanoacrylate, making it a useful balance for many instant adhesive formulations.
Q:
Why is moisture control important for N-Butyl Cyanoacrylate?

A: Cyanoacrylate monomers undergo anionic polymerization when exposed to water, moisture, or weak bases. Sealed moisture-resistant packaging and low-humidity storage prevent premature polymerization, viscosity increase, or gelling before formulation.
Q:
What substrates can N-Butyl Cyanoacrylate bond?

A: Formulated adhesives based on this monomer are commonly used for plastics, rubber, and metal substrates in industrial assembly. Bond performance depends on the formulation, surface preparation, gap, and cure conditions, not on the monomer alone.
Q:
What are the typical physical properties of N-Butyl Cyanoacrylate?

A: It is a colorless to slightly yellow transparent liquid with a molecular weight of 153.18 g/mol and a density around 0.99 g/cm3 at 20°C. It has limited water solubility and is generally soluble in organic solvents used in adhesive formulation.

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