Last updated: 15/10/2025 07:43:22
MAR-71 BIOCIDE (BOX: 3x 5 LTR)
Product Code
- Product group:
- 653
- Product number:
- 735977
MAR-71™ is a very effective biocide, used to prevent and combat microbiological growth in closed cooling water systems. Mar-71 is not for sale in USA&CANADA. For USA: Use 7330 (Product no: 907004)
Product information
This product supersedes product no: 613809
Bacteria are the cause of many corrosion problems, as while they grow, they produce a variety of acids and in some cases slimy layers on metal surfaces which results in reduced heat transfer and corrosion in bearings. Nitrites, Phosphates and emulsifying oils are good nutrient media for bacteria. MAR-71™ has proven to be a very effective disinfectant. Lower dosages of MAR-71™ can also be used to prevent infection.
Features
- Kills micro-organisms in closed cooling water systems
- Prevents corrosion caused by microorganisms
- No cases have been reported where bacteria have become immune to MAR-71
- Biodegradable, does not accumulate in the environment
- HOCNF registered for use in the North Sea Offshore sector, yellow/gold classification
Benefits
- One product, two different applications
Specification
General
| Invent Hazard Material (IMO/EU) classification | C-7 |
|---|
Physical properties
| Appearance | Colourless to yellow |
|---|---|
| Density [g/ml] | 1.06 |
| Form | Liquid |
| pH | 10 in 0.15% solution |
Technical data
| Solubility in water | Totally soluble |
|---|
Approvals
- Approved by The Norwegian Food Safety Authority
Safety Data Sheet (SDS)
Documents
Directions for use
Closed cooling water circuits Especially when berthing for a longer period in harbours in warmer climates, the risk of infection of the cooling water systems with microorganisms is considerable. When this happens, acids are formed and at the same time, the nitrite based corrosion inhibitors present in the system will be eaten away by the bacteria resulting in underdeposit corrosion. Regular testing for the presence of bacteria in the cooling water by the use of "dip slides" is therefore strongly recommended. Between 0.5 and 1.5 litres/ton. MAR-71 should be added to contaminated systems. The system should be circulated for three days after which the complete contents of the cooling system is dumped. The system should also be thoroughly flushed with fresh water prior to refilling the system with (distilled) water and initial dosage of corrosion inhibitor to establish corrosion protection. The choice of inhibitor include, nitrite based inhibitors (Rocor NB Liquid, EWT 9-108, Nalfleet 2000), or organic based inhibitor ( Cooltreat AL or Cooltreat ELC) can be used for initial fill and should follow the individual product application guideline. It is recommended to re-test for the presence of bacteria after the system has been in operation for 24 hours. The described procedure is to be repeated if necessary. For heavily contaminated systems and systems contaminated with scale/oil, it is recommended to acid clean and/or degrease the system prior to disinfecting
Caution: During disinfecting, evaporators and other equipment which use cooling water and which are used in connection with the production of drinking water are not to be used.
Use biocides safely. Always read the label and product information before use
