Five years ago, ordering biodegradable cleaning chemicals for a vessel meant accepting a noticeable performance trade-off. The eco formulations smelled different, foamed less, and required longer dwell times to clean equivalently. That gap has largely closed. For most general cleaning duty on board, current biodegradable products perform comparably to traditional chemistries, and many vessels have made the switch as default.
The shift is driven by both regulation and operator preference. Port discharge rules at Chennai Port and most major Indian ports have tightened on what can be released through scuppers and bilge separators. Major shipping lines have made commitments to reduce hazardous chemical inventories on board. Both pressures push toward biodegradable formulations as the default.
Where biodegradable works well
Galley cleaning - degreasers, surface cleaners, dishwasher detergents - is a category where biodegradable products are now functionally interchangeable with traditional formulations. The food-contact compliance is straightforward, the performance is comparable, and the disposal-via-grey-water-system is significantly cleaner.
Accommodation cleaning - floor cleaners, bathroom cleaners, glass cleaners - is similar. The chemistry has matured to the point where the eco versions perform without compromise. Crew preference often favours the eco versions because they smell less aggressive and cause fewer irritation issues for staff using them daily.
Deck cleaning for routine wash-down: well-served by biodegradable products, especially given the discharge sensitivity of modern ports. Even where deck cleaning chemicals end up in scupper drains, the environmental impact is dramatically reduced.
Where traditional formulations still hold
Specialist tank-cleaning chemicals for cargo residue removal on tankers - certain previous cargoes leave residues that only the stronger traditional solvents will fully clean. Substitution here can leave residues that contaminate the next cargo, which is a far worse outcome than the chemical impact.
Boiler and cooling-system water treatment chemicals - the chemistry has specific functional requirements (oxygen scavenging, hardness control, pH buffering) that biodegradable alternatives do not always match. This is a category where the marine engineering community is still cautious about switching.
Heavy-duty engine room degreasing for spilled fuel oil and lube oil - traditional solvents remove these contaminants more effectively than current biodegradable options. The right policy here is not blanket switching but careful application: use biodegradable products for routine maintenance cleaning and reserve heavy chemistries for the actual heavy duty.
Reading the labels
Biodegradable is a spectrum, not a binary. Genuine fully-biodegradable products carry test certifications - typically OECD 301 or equivalent - that document degradation rates under standard conditions. Marketing-grade "eco-friendly" claims without supporting test data should be treated with appropriate scepticism. The MSDS of any cleaning chemical should be reviewed for biodegradability data before substitution decisions.
Marine eco-label schemes (Nordic Swan, EU Ecolabel, similar regional schemes) provide a third-party verification layer. Products carrying these marks have passed defined criteria; products without them are claiming on their own authority.
Practical procurement
For vessels updating their chemical inventory, the sensible approach is category-by-category rather than wholesale switching. Map the current chemicals against duty (galley cleaning, accommodation, deck wash, machinery space cleaning, tank cleaning). For each category, evaluate whether a biodegradable equivalent exists with documented performance for that specific duty. Where it does, switch. Where it does not, retain the traditional formulation but tighten the disposal controls.
This category-by-category approach also makes the transition manageable for crew - the operational change is gradual rather than disruptive, and any performance issues can be flagged and addressed before they become widespread.
From a chandler's perspective
Stocking biodegradable equivalents has become the default rather than the exception for most cleaning categories. The supply chain has matured, the price gap has narrowed, and the demand has shifted. Vessels that still order legacy chemistry as standard increasingly do so because no one has reviewed the inventory recently rather than because of an active preference.
For biodegradable and conventional cleaning chemical supply at Chennai Port, see our ship chandler at Chennai Port chemicals supply scope.