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Chemical Name: 2-Pentanone Oxime
Function: Intermediate, Oxygen Scavenger, Corrosion Inhibitor, Blocking Agent, Antioxidant, Anti-Skinning Agent
CAS Number: 623-40-5
Labeling Claims: Low Toxicity, High Purity, Water-free
Synonyms: Methyl n-propyl ketoxime, Methyl propyl ketone oxime, Methyl propyl ketoxime, NSC 73149
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TypeDocument Name
Technical Data Sheet
EZ-Blox® Technical Data Sheet
EZ-Blox® Technical Data Sheet
Technical Data Sheet
EZ-Blox® Anti-Skinning Agent Brochure
EZ-Blox® Anti-Skinning Agent Brochure
Safety Data Sheet
AdvanSix EZ-Blox® Safety Data Sheet
AdvanSix EZ-Blox® Safety Data Sheet
Safety Data Sheet

Knowde Enhanced TDS

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Identification & Functionality

EZ-Blox® Features & Benefits

Performance Highlights

EZ-Blox® anti-skinning agent has a distinct, low-toxicity profile, and can be used as a drop in replacement for MEKO. These and other qualities described below are particularly important to European customers who need to address, in advance, the proposed recategorisation of MEKO with a reliable, proven and easy-to-convert solution.

EZ-Blox® Performance Overview

Benefits Characteristics Details
Safe To Use Low Worker Exposure Comfortably meets strictest German OEL1 standards, with a risk profile up to 100 times safer than MEKO3 .
Low Toxicology Profile
  • Not a skin sensitiser
  • No acute hazard concerns
  • Not genotoxic in animals
  • DNEL1 is at least twenty-five times higher than MEKO therefore, EZ-Blox® anti-skinning agent is safer than MEKO
  • Presently, the sole REACH registrant worldwide
No Cancer-Causing Potential in Liver As determined from toxicogenomic analysis
Favorable Results Extensive body of independent research and testing demonstrates EZ-Blox® anti-skinning agent has a distinct, low-toxicology profile.
Cost Effective Easy Switchover Paint producers have no need for costly reformulations or extensive research and development work.
Flexible Enables dosage flexibility similar to MEKO, resulting in low operational costs.
Unique All other alternative anti-skinning agents would require costly formulation changes.
Proven Performance Customer Approved Alkyd resin and paint producers in the European Union have fully tested and approved EZ-Blox® anti-skinning agent as a drop-in replacement for MEKO.
Market Validated Many paint producers have already launched decorative and wood coating products in the EU market utilizing EZ-Blox® anti-skinning agent.
High Quality Anti-skinning performance and compatibility are equivalent to the highest standard MEKO; no other alternative can match these results.

Applications & Uses


Physical Form
Clear liquid
Typical Properties
ValueUnitsTest Method / Conditions
Alcohols, Ketones and Oximes Impuritiesmax. 0.30%-
Assaymin. 99%-
Colormax. 10APHA(Pt-Co)-
Methyl isobutyl Ketoxime Contentmax. 0.50%-
Water Contentmax. 0.20%-
Physico-Chemical Properties
ValueUnitsTest Method / Conditions
Boiling Point (at 101.7 kPa)172 (341.6)°C (°F)-
Density (at 20°C (68°F))0.903g/ml-
Flash Point (at 102.1 kPa)69 (156.2)°C (°F)-
Melting Point (at 101.7 kPa)-45°C-
Molecular Weight101.15--
Solubility in Water34.7g/L-
Vapor Pressure (at 20°C (68°F))1.6mmHg-

Regulatory & Compliance

Certifications & Compliance

Packaging & Availability

Packaging Type

Storage & Handling


Store in a cool, dry, well-ventilated area. Keep away from strong acids and oxidizers. Protect containers from physical damage. Keep upright and tightly closed.