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 CAS 6606-65-1

N-Butyl Cyanoacrylate is a reactive cyanoacrylate monomer designed for use in instant adhesive systems that cure rapidly in the presence of moisture. It is widely used as a base raw material in adhesive formulations where fast bonding, good adhesion to various substrates, and controlled curing behavior are required.

In industrial supply, N-Butyl Cyanoacrylate is provided as a stabilized liquid to ensure storage stability and controlled polymerization during handling. It is typically used by formulators in adhesive manufacturing rather than as a direct end-use product. Standard packaging and documentation such as COA, TDS, and SDS are available to support industrial procurement and formulation work.

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: Supplied in moisture-protected liquid chemical packaging; packaging can be arranged based on order volume and transport requirements

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Product Description

1 Physicochemical Properties

2 Typical Applications

3 Packaging

4 Storage

Physicochemical Properties

Appearance	Colorless to slightly yellow transparent liquid
Odor	Mild, characteristic acrylate-like odor
Molecular Weight	Approx. 153.18 g/mol
Boiling Point	Approx. 68°C (at 1.8 mmHg)
Density	Approx. 0.99 g/cm³ (at 20°C)
Viscosity	Low viscosity liquid
Solubility	Limited water solubility; soluble in organic solvents
Reactivity	Rapid polymerization in presence of moisture or basic substances

Typical Applications

Instant adhesive formulations: Core monomer used in fast-curing cyanoacrylate adhesive systems.
Industrial bonding systems: Suitable for bonding plastics, rubber, and metal substrates in assembly processes.
Specialty adhesive development: Used in formulations requiring flexibility and controlled curing compared to shorter-chain cyanoacrylates.
Medical and technical adhesive systems: Certain grades may be used in regulated applications; specific use depends on compliance with local regulations.

For related acrylic monomer pages used in resin and adhesive systems, compare Methyl Methacrylate and Ethyl Acrylate.

Packaging

N-Butyl Cyanoacrylate is supplied as a moisture-sensitive liquid and is typically packed in sealed containers designed to minimize exposure to humidity and prevent premature polymerization. Containers are filled under controlled conditions to maintain product stability.

For industrial supply, packaging may include small containers for formulation use or larger drums for bulk handling. All packaging is selected to ensure compatibility with reactive monomers and to maintain storage integrity during transportation.

Storage

Store in a cool, dry, and well-ventilated area away from heat, moisture, and direct sunlight. Keep containers tightly sealed at all times. Refrigerated storage may be used to extend shelf life. Avoid contact with moisture and alkaline materials to prevent premature polymerization.

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.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

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