Meaning of "qs.100" in a Formulation

In formulations, "qs" stands for "quantum satis" or "quantum sufficit," which are Latin terms meaning "as much as is sufficient" or "a sufficient quantity."

When you see "qs.100" next to an ingredient like "น้ำสะอาด" (purified water), it means that the purified water is added in a "sufficient quantity" to bring the total weight or volume of the formulation up to 100 units (usually grams or milliliters, depending on the context of the formula).

So, if you have other ingredients listed with specific amounts (e.g., Ingredient A: 10g, Ingredient B: 5g), "น้ำสะอาด qs.100" means you would add water until the combined weight of Ingredient A, Ingredient B, and the water reaches 100g. It's used to top up the formula to a final desired amount.

In summary: "น้ำสะอาด qs.100" means add purified water as needed to make the total batch size 100 (units).