Selling online

The channel the product fights hardest, for two reasons that are both structural.

Freight is the problem

A liter weighs a kilogram, it leaks, and it is worth a few pounds.

Shipping cost is frequently a large fraction of the order value, which makes single-bottle sales marginal and pushes everything towards multi-buys, subscriptions and concentrates.

Induction seals are not optional here: a cap alone under a courier is a leak.

Your listing is labeling

Intended use is established by how the product is represented, and a product page is a representation.

A correctly labeled cleaner listed in a "disinfectants" category, or with "antibacterial" in the title for search traffic, is making a pesticidal claim through the listing.

That is the single commonest way a compliant product becomes a non-compliant business, because the person writing listings is optimizing for search rather than thinking about FIFRA.

The same applies to the featured reviews, which are claims you have adopted.

The hazardous materials question

The one that stops businesses rather than fining them.

A flammable, corrosive or oxidizing product is hazardous material for transport under the DOT regulations, which reaches packaging, marking, documentation and training.

Carriers restrict it, air is frequently out entirely, and some marketplaces prohibit it.

Settle this before building a range around a strong product, because it decides whether the product can be sold online at all.

What works

Concentrates and tablets, which remove most of the freight.

Multi-packs and starter kits, where one shipment covers several products.

Refill subscriptions, which suit a consumable and smooth the freight over repeat orders.

And a published ingredient list, which is required for California anyway and is the thing this customer is actually searching for.

References