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Edition Date :
April 29, 2020
From the 1st of January 2020, the International Maritime Organization will implement a sulphur limit for marine fuels of 0.5% also known as “IMO 2020”. These low sulphur fuel oils (LSFO) may partly arrive from a sweet crude diet and as a residue based blend of different refinery streams, like straight run, hydro-treated or hydro-cracked components. Depending on the composition, the LSFO qualities may show an increased pour point.


Clariant’s DODIFLOW® 8421 is a specialized pour point depressant developed to improve the cold flow properties of 0.5% sulphur fuel oils that allows for compliance to the ISO 8217 fuel specification.


  • Specialized pour point depressant designed to improve the cold flow properties of LSFO.
  • Prevents gelling of residue based low sulphur fuel oils.
  • Allows for compliance to ISO 8217 specification.


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Please contact us for safety and regulatory details or the Material Safety Data Sheet (MSDS).

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DODIFLOW® 8421 is intended for technical use only. Please consult the safety data sheet for further information.


Appearance (20°C)
 VisualPale brown waxy solid
Density (40°C)
DIN EN ISO 15212-1
 [g/cm3]0.87 -0.91
Viscosity (80°C)
DIN 53015
Pour Point
DIN ISO 3016
Flash Point
Solubility (at 30 °C)
 The product is soluble in aromatic

solvents, like toluene, xylene.

It is insoluble in both lower alcohols and water.

Application & Dose Rates

DODIFLOW® 8421 can be injected undiluted when heated up to 50 – 60°C before use. At oil temperatures below 50°C, however, a dilution with an aromatic hydrocarbon in ratios of 1:1 to 1:4 is advised in order to ensure a good blending into the fuel steam. Dose rates depend on the fuel oil composition. Generally dose rates between 200 – 500 ppm are sufficient to achieve the required specification. In some cases, increased dose rates up to 2000 ppm may also be nessesary.

Packaging & Storage

DODIFLOW® 8421 is available in in drums (200 L) or as bulk material in ISO container or road tank cars. When stored in the original closed drums and protected from environmental effects, DODIFLOW® 8421 can be stored on the shelf life for two years. A temperature of 50-60°C is recommended for storing the product.

Important: After prolonged storage at lower temperatures, the additive should first be heated and homogenized before further use.

Composition & Material Compatibility

DODIFLOW® 8421 is a polymer composition dissolved in higher boiling hydrocarbons. The compatability with metals, plastics and elastomers were deduced from typical behavior against the containing solvent. The product is compatible for storage in carbon and stainless steel. Other compatible materials are PTFE and flouroelastomers.

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