ZOK Gold

ZOK 27® GOLD Standard and ZOK mx® GOLD Standard were specifically developed to meet the stringent regulatory requirements for use in the North Sea. They are highly refined versions of ZOK 27® and ZOK mx®.

Offshore requirements in the North Sea – how the system works, country by country


The OCNS (Offshore Chemical Notification Scheme) conducts hazard assessments, by means of a CHARM model, on chemical products which are used offshore. This results in a Hazard Quotient (HQ) relating to toxicity, bioaccumulation and biodegradability. The resulting HQ is converted to a colour banding, with GOLD having very little environmental impact. The ZOK GOLD Standard products are colour banded gold, and contain no components which are candidates for substitution. The UK scheme is administered by Cefas (Centre for Environment, Fisheries and Aquaculture Science).


The Netherlands scheme is also administered by Cefas, but does not use the colour banding system.


Add Energy’s KPD Centre, who administer the HOCNF (Harmonised Offshore Chemical Notification Format) for Norway, list the products which are approved for use on a database which is only available to registered offshore end users.


The Danish Environmental Protection Agency operate the HOCNF for Denmark, and ZOK products are listed on their files, with product registration numbers.


ZOK Gold Product Data Sheet
Click here to view the Product Data Sheet.


Approved By
Conforms to OEM specifications:client_logo_geclient_logo_siemens

and all other major engine manufacturers


Used By