Rosemary in scalp formulations: what to specify in the enquiry

Rosemary is one of those components where the name on the label tells you the least. Rosmarinus officinalis can stand for a leaf extract in glycol, an alcoholic extract, an essential oil or a purified fraction. These are different raw materials with different prices, different behaviour in a formulation and different labelling duties. Here is what to put in an enquiry so that the offers you receive are comparable.

An extract and an essential oil are not the same thing

An essential oil is obtained by distillation: it is volatile, strongly scented and active at small percentages. An extract is obtained with a solvent, is far less scented and behaves quite differently in a formulation. For a product that stays on the scalp the difference matters: an essential oil brings odour and calls for care with dosage, while an extract is easier to build into a base.

If an enquiry simply says «rosemary», three suppliers will send three different offers and comparing them by price per kilogram will be meaningless. The first thing to fix is the form of the raw material.

Carrier solvent and plant part

An extract always has a carrier: glycol, glycerin, water, alcohol. The carrier enters the formulation together with the active fraction and affects everything at once — compatibility with the base, preservation, the final label, and sometimes whether the product qualifies as natural under the standard you need.

The second variable is the plant part and how it was grown. The Indian company Sunpure supplies rosemary within a range of standardised plant extracts, and with a supplier like that it makes sense to request the full specification rather than just the item name.

Standardisation: what you are paying for

A standardised extract means the producer declares the content of a defined marker substance and confirms it in the certificate of analysis for the batch. Without standardisation you are buying plant material with a floating composition, and the product will differ from batch to batch.

It is worth asking three things in the enquiry: which marker, measured by which method, within which tolerance. A supplier who answers all three without hesitation is a good sign. No standardisation at all is not a defect — but then the price should be lower and you have to budget for incoming control.

Allergens and labelling

Essential oils contain substances that in a number of markets must be declared in the ingredient list once a threshold is exceeded. For leave-in products that threshold is lower than for rinse-off. This is a technical detail, easy to miss at the raw-material stage and impossible to fix after the label is printed.

So state the destination market in the enquiry from the start. An export-facing supplier usually knows the requirements and can select a form of raw material to suit them. Asking them to guess the market means transferring your risk to a place where it will not be accounted for.

What to write in the enquiry

The form of the raw material: extract or essential oil. The carrier, if an extract. The standardisation marker and method. The plant part and the origin. The destination market and the confirmations you need: vegan, halal, non-GMO. The intended dosage and the product type, rinse-off or leave-in.

Such an enquiry takes six lines and saves a month of correspondence. Without it you will receive three incomparable offers and spend time working out what could have been stated up front.