ASCOTRAN® HW10 is a powerful ready-to-use liquid flash-rust inhibitor for water-based coatings. It also functions as a corrosion inhibitor for protecting metal packaging.

Functions: Corrosion Inhibitor, Flash Rust Inhibitor

Chemical Family: Nitrites, Sodium Salts

End Uses: 2K (2 component) Coating, Waterborne Coating

Labeling Claims: Bio-based, Not Listed In California Proposition 65, VOC-free

Features: Good Compatibility, Water Resistance

Synonyms: E 250, Nitrous Acid Soda, Sodium nitrite (NaNO2)

Technical Data Sheet

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Identification & Functionality

Chemical Family
Chemical Name
CASE Ingredients Functions
Product Families
Chemical Nature

Aqueous preparation made of organic acid salts and sodium nitrite.

Features & Benefits

Labeling Claims
CASE Ingredients Features
Product Features
  • Ready-to-use and powerful liquid-form flash-rust inhibitor for water-based coating.
  • Corrosion inhibitor for metal packaging protection.
  • Optimized for critical cases (welds, cast iron, sanded substrates)
  • Improves coating’s water resistance
  • Mainly formulated with bio-based substances

Applications & Uses

Compatible Substrates & Surfaces
Coating End Applications
Use Level
0.1 - 0.3% (on degreased steel. not rusted. sand-blasted or not.), 0.5 - 1% (on cast-iron or rusted substrates.), 0.8 - 1.2% (on welds), 0.3 - 1.5% for packaging protection.
Product Application
  • Can be added to neutral or alkaline water-based coatings of any nature, for industrial, professional or do-it-yourself use
  • In 2K systems: should be added in the resin part in most cases (to be checked with preliminary testing). Indicative use dosages (% of total coating weight)


Physical Form
Pale yellow limpid liquid
Compatible with
Most binders
Immiscible In
Miscible in
Ethanol, Glycols
Typical Properties
ValueUnitsTest Method / Conditions
Density (at 20°C)1.11 - 1.15--
Viscosity (at 20°C)60 - 100cPs-
pH Pure (at 20°C)7.3 - 7.9--
Freezing Pointmax. 0°C-
Volatile Organic Compounds*0.0%-

*According to directive 2004-42-CE

Regulatory & Compliance

Packaging & Availability

Packaging Type
Packaging Information
  • Plastic pail of 30kg net.
  • Metal drum of 200kg net.
  • IBC of 1000 kg net.

No specific condition for transport. Weight and packaging size (off-pallet) :

  • Pail : 1.5kg - Ø30, H50
  • Drum : 15kg - Ø60, H90
  • IBC : 70kg - L120, l100, H120

Storage & Handling

Shelf Life
2 Years
Storage and Shelf Information
  • Ideal temperature conditions: 0 to 30°C.
  • Exposure: avoid direct exposure to sunlight.
  • Expiration: 2 years in its original closed drum, in storage conditions described above.