How to Read an SDS (Safety Data Sheet): A Practical Guide for Fragrance Makers

Every raw material has an identity. The SDS (Safety Data Sheet — formerly known as MSDS) is the official version of that identity. Before you open a bottle of fragrance oil, the SDS is the only document that tells you how it will behave.

If you are a producer or aspiring seller, the SDS is not a formality — it is a responsibility. When you store a product, hand it to a courier, label it, or discuss it with a customer, this document is your foundation. The standard format consists of 16 sections, but you don't need to read every one with equal care. What matters is knowing which section answers which question.

The rest serves as reference material, but these four sections directly govern your day-to-day work. Let's go through each one.

Section 2 — Hazard Identification. This is where you find pictograms and H-statements. H226 means "Flammable liquid and vapour"; most fragrance oils and alcohols carry this designation. If you see H317 ("May cause an allergic skin reaction"), think carefully before using the product in any formula that will come into contact with skin. This is the starting point for the whole topic of skin safety and patch testing.

Section 7 — Handling and Storage. Here the manufacturer tells you the ideal storage conditions: cool, away from light, tightly sealed. This is the official answer to the question of how to store fragrance oils and perfumes correctly. Follow the temperature range stated here; oxidation and colour change are most often caused by ignoring this guidance.

Section 9 — Physical and Chemical Properties. The flash point (flash point — the lowest temperature at which the vapour can ignite) and density values listed here are golden information for both safety and formula work. If you know the density, you will never make errors when converting between volume and weight.

Section 14 — Transport Information. The UN number and hazard class are found here. You cannot legally ship flammable products without this information. This section is the heart of shipping and freight regulations.

When a new SDS lands in your hands, don't browse it at random. Follow a disciplined sequence, from the top note down to the base.

Learning to read an SDS is one thing; interpreting it correctly is another. Here are the most common pitfalls:

Mistake one: Treating the SDS as an IFRA document. An SDS covers safety and transport; it does not specify safe usage levels for products that contact skin. Do not confuse the two.

Mistake two: Ignoring the flash point. Leaving a product with a low flash point near a heat source creates both a fire hazard and a risk of scent degradation.

Mistake three: Working from an outdated document. An SDS past its revision date cannot demonstrate compliance with current regulations.