Reading a Vietnamese Product Label

Somebody has treated your apartment and left a can on the counter, or you are standing in a supermarket aisle, or a contractor has emailed a photograph of a bottle. The label is in Vietnamese and the important part is not.

One line on any registered product tells you most of what you need, and the words on it are chemical names that are the same in every language.

Find "hoạt chất"

Hoạt chất means active ingredient, and it is followed by a name and a percentage. Cypermethrin 10%, Alpha-cypermethrin 5%, Deltamethrin 2.5%, Fipronil 0.05%, Imidacloprid 2.15%, Permethrin, Lambda-cyhalothrin, Bifenthrin, Indoxacarb, Chlorfenapyr, Pyriproxyfen, Methoprene.

That name is the product. Everything else on the label is packaging, dose instructions and marketing.

What the common ones do

• Names ending in -thrin (cypermethrin, deltamethrin, permethrin, bifenthrin) are pyrethroids: fast-acting contact insecticides, generally repellent, used as residual sprays.
• Fipronil — non-repellent, transferred between individuals, which is why it is used in cockroach and ant gels and in termite work.
• Imidacloprid — a neonicotinoid, used in gels, termite treatments and some flea products.
• Indoxacarb, chlorfenapyr — activated inside the insect, common in modern cockroach gels.
• Pyriproxyfen, methoprene, hydroprene — insect growth regulators. These do not kill adults; they stop development. Essential in flea and cockroach programmes.
• Bacillus thuringiensis israelensis (Bti) — a bacterial larvicide, specific to mosquito larvae, used in standing water.

The registration number

Số đăng ký is the registration number, and a household or professional insecticide sold legally in Vietnam carries one. It is issued through the Ministry of Health system for products used in domestic and public health settings.

A product with no registration number is not necessarily dangerous, but it is not something a professional should be applying in your home, and it is not something you can check.

Dose and dilution

Liều lượng is the dose rate, pha loãng means dilute, and you will usually see something like pha 25 ml với 1 lít nước — mix 25 ml with one litre of water. The rate matters more than people assume: under-dosing produces poor results and contributes to resistance, and over-dosing does not improve the outcome while increasing exposure and residue.

If a technician is mixing on site and you are curious, asking to see the label and the measure is a completely reasonable thing to do.

Formulation type also appears on the label and changes how a product behaves. EC is an emulsifiable concentrate, which usually carries a solvent odour; SC is a suspension concentrate, generally lower odour and better on porous surfaces; WP is a wettable powder, which leaves a visible residue and lasts longer on absorbent walls. A technician choosing SC over EC for an occupied bedroom is making a deliberate decision rather than using whatever was in the van.

Safety wording, and how to read it

Độc means toxic. Cảnh báo is a warning. Tránh xa trẻ em means keep away from children. Không dùng cho khu vực chế biến thực phẩm means do not use in food preparation areas, which is a line worth looking for if the treatment is in a kitchen.

The phrase an toàn cho người và vật nuôi — safe for people and pets — appears on a great deal of packaging and is a marketing claim rather than a regulatory classification. Treat it as advertising, and look at the active ingredient and the warnings instead.

What a professional should be able to tell you

The active ingredient, the concentration applied, where it was applied, and the re-entry period. Those four should be on the service report without you having to ask, and if a company cannot supply them the issue is their record-keeping rather than their chemistry. For a household with children, a pregnancy or animals, this is exactly the information a doctor or a vet would want if anyone ever asked.

Related reading

The vocabulary is in our glossary, and the general picture in products used in Vietnam. For safety questions see safety with children and pets and low-toxicity options. Growth regulators are explained in how pest treatment works. Our parent company lists the same products in Vietnamese across its service pages.

Global Pest Control is the English-language arm of Khử Trùng Toàn Cầu. Our reports name the active ingredient and the concentration for every application.

Common questions

The label says odourless. Does that mean it is safer?

No — odour and toxicity are unrelated properties. Many modern formulations are low-odour because the solvent has been changed, and that is a comfort improvement rather than a safety one. Judge the product by the active ingredient and where it is being applied, not by how the room smells afterwards.

Can I buy professional products myself?

Some are available in agricultural supply shops here, and the practical problem is not access but application. Concentration, placement and choice of formulation are most of the outcome, and the common failure is a repellent spray applied where a non-repellent bait was needed, which scatters a population and makes the eventual professional treatment harder.

How do I know if a product is registered?

Look for "số đăng ký" on the label with a number after it. A registered product also names the responsible company and gives contact details. Unlabelled bottles, decanted product and containers with a handwritten name should not be used in your home by anyone.