What substance does the name Galaxolide refer to?

It is a trade name, originated by a fragrance house, for a polycyclic musk that technical literature calls HHCB, a hexahydro-hexamethyl cyclopenta benzopyran with the molecular formula C18H26O and a molar mass of 258.40 g/mol. Its CAS number is 1222-05-5. Comparable material is offered by other producers under other trade names, so a purchase specification written around a trade name rather than around the CAS number will eventually be filled with something the buyer did not intend. Put the CAS number on the enquiry, and take the EC number from the current safety data sheet of the lot rather than from any secondary source.

Why is it sold as a solution rather than pure?

Because the neat material is a thick, tacky mass that is awkward to weigh, to pump and to clean out of a vessel, and because a solution disperses more predictably into a fragrance base. Suppliers therefore dissolve it in a carrier such as a phthalate ester, benzyl benzoate, a myristate ester or a hydrogenated vegetable oil. The proportion of active musk is a specification figure rather than a constant of the substance, and it varies between suppliers and sometimes between grades from one supplier, so it has to be read off the document and carried into the dosing arithmetic.

Does the carrier matter if it is only a solvent?

It matters as much as the musk does. The carrier goes into your finished product, appears in your own declarations, brings its own regulatory position in each market of sale, and carries its own supply and quality risk. It also governs the practical behaviour of the delivered liquid: how easily it pours, how it disperses in your base, and how much odour of its own it contributes. Two lots with the same musk content and different carriers are, for formulation and for documentation purposes, two different raw materials.

What is the regulatory position of this musk?

That is not a question a general article should answer for you, and an article that answers it confidently is the wrong source. Polycyclic musks have been the subject of regulatory and industry review in several jurisdictions, positions differ by market and by use category, and a restriction may attach to the substance, to a use, or to a level in a finished product. Establish the position from the current safety data sheet, from an explicit written statement of applicable restrictions per market of sale, and from fragrance industry conformity documentation where the finished article is a fragranced consumer product. Re-check on every document revision rather than once at qualification.

Why is it used in laundry and household products in particular?

Because the property a formulator is buying is persistence on the treated substrate. A fragrance that evaporates during washing and drying never reaches the moment when the consumer judges the product, so laundry and surface-care formulations lean on materials that survive that process and are released slowly afterwards. The same durability is what makes the material unforgiving in other respects: it is not the ingredient for a product whose point is a clean, fast top note, and its behaviour in strongly alkaline or oxidising bases has to be tested in the actual base rather than assumed.

Galaxolide as a raw material: form, carrier, documents

Technical article · Eapearl Chemical · 25 August 2026

This musk is almost never bought as a pure solid. It arrives as a solution in a carrier, and the carrier decides as much about the formulation and the paperwork as the musk itself does.

What the name actually refers to

Galaxolide is a trade name, originated and owned by a fragrance house, for a polycyclic musk that technical literature calls HHCB: a hexahydro-hexamethyl cyclopenta benzopyran with the molecular formula C₁₈H₂₆O, a molar mass of 258.40 g/mol and CAS 1222-05-5. Comparable material reaches the market from other producers under other trade names, and internally most companies keep using whichever name the first supplier used. That habit is the root of a recurring procurement failure: a specification built around a trade name is a specification built around a single supplier, and on the day that supplier cannot deliver, the substitute gets evaluated against a name instead of against an identity.

Write the CAS number into the specification and into the enquiry. Take the EC number from the current safety data sheet of the lot being purchased rather than from an article or from memory, because a transcribed identifier that is wrong by one digit will sit unchallenged in an internal system for years and will surface at the least convenient moment, usually during a customer audit or a market notification.

The commercial form is a solution, and that is deliberate

Neat HHCB is a thick, tacky material that is difficult to weigh accurately, difficult to pump and difficult to recover from a vessel. Suppliers therefore dissolve it, and what arrives on the compounding floor is a solution in a carrier. Which carrier depends on the supplier and on the market the grade is aimed at; the common choices include diethyl phthalate, benzyl benzoate, a myristate ester and hydrogenated vegetable oils. The proportion of active musk sits near half in many commercial grades, but that is a specification line rather than a property of the substance, and it differs between suppliers and sometimes between grades from the same supplier.

Three consequences follow at once, and all three are routinely missed.

The dosing arithmetic is not the label figure. A formula written against active musk has to be converted using the assay of the delivered solution. A change of supplier that shifts the active content by a few points shifts the whole fragrance balance with it.
The carrier is an ingredient in the finished product. It appears in the composition, inherits its own regulatory position in each market of sale, and has to be declared and defended exactly like any other raw material.
The physical behaviour belongs to the solution, not to the musk. Pourability, dispersion in the base and the residual odour contribution are properties of the mixture that was actually delivered, not of the molecule named on the order.

Qualify the carrier as a raw material in its own right

Whenever a supplier or a grade changes, treat the carrier as a second qualification that happens to arrive in the same drum. The questions worth asking are short and specific.

Which carrier is used, by name and by identifier, and is it fixed for the grade or may it be substituted without notice?
What is the active musk content, determined by which method, and what tolerance does the supplier commit to?
Does the carrier carry restrictions in any market you sell into, and who is tracking that position after qualification closes?
Does the carrier contribute odour of its own, and has that been assessed in your base rather than on a smelling strip alone?
How does the carrier behave in your process: does it disperse cold, does it need a premix, does it separate on standing?
If the carrier is an ester or an oil, what is its ageing behaviour, and what does the supplier recommend where turnover is slow?

A change-notification clause in the supply agreement is the mechanism that keeps these answers current. Without one, the carrier can change between lots and the first sign of it will be a formulation that no longer smells the way it did.

Storage, ageing and the lot that sat too long

The musk itself is a reasonably robust molecule; what usually deteriorates first is the carrier and the packaging discipline around it. Colour drift, an off note that was not present at delivery, or a separation on standing are all signals worth investigating rather than stirring back in. Keep containers closed, keep them out of direct light and away from heat sources, and hold the material in the packaging the supplier recommends, because fragrance materials can be absorbed by unsuitable plastics and can extract additives out of them.

Where turnover is slow, treat headspace as the variable to control: a part-used container spends most of its life in contact with air. Blanketing, smaller pack sizes and a genuine first-in first-out discipline are all cheaper than the investigation that follows a batch rejected on odour. Keep a retained sample of every lot and assess the retains alongside incoming material, because a drift is only visible against a reference, and a single certificate cannot show a trend.

Behaviour in daily-use products

The reason this class of material is specified in laundry, fabric care and surface care is persistence: the fragrance has to survive the wash, the dry and the wear, and be released slowly afterwards. That durability comes with conditions attached, and each of them has to be tested in the real base rather than inferred from a data sheet.

Strongly alkaline bases are the first stability question in a detergent or a hard-surface cleaner, and the answer is specific to the base, not to the fragrance material.
Oxidising systems, including bleach-containing formulations, are the second question, and a fragrance that performs well in a neutral cleaner may not survive them.
Solid formats, soap in particular, raise discoloration as a separate matter from odour stability, and both need storage trials in the finished pack.
Powders and encapsulated systems behave differently again, because the material is not simply dissolved but carried on or inside another particle.
Packaging closes the loop: sorption into a bottle wall or a liner will change the product across shelf life even when the formulation itself is stable.

Establishing the regulatory position, without guessing

Polycyclic musks have been the subject of regulatory and industry review in a number of jurisdictions. Positions differ by market, by use category and by whether a restriction attaches to the substance, to an application or to a level in the finished article, and they are revised over time. For that reason the only defensible method is documentary rather than editorial. Obtain the current safety data sheet with its revision date. Ask the supplier for an explicit written statement of applicable restrictions for each market you sell into. Obtain fragrance industry conformity documentation where the end product is a fragranced consumer article. Then re-check the position whenever any of those documents is revised, rather than once at qualification and never again. Nothing in this article should be treated as a statement of current status in any market.

What to put on the enquiry

CAS number and the exact grade or trade designation, not the family name alone.
Carrier identity, and whether it is fixed for the grade.
Active content, with method and tolerance.
Intended application and market of sale, so that the correct grade and the correct documents are quoted from the start.
Documentation required: safety data sheet, specification, lot certificate, composition and allergen statements as applicable, and any conformity documents the end use requires.
Packaging, pack size, and any storage recommendation the supplier wishes to attach to it.
A change-notification commitment covering both the musk and the carrier.

Related materials in our catalogue include musk raw materials, the carrier ester diethyl phthalate and the general-purpose fragrance solvent benzyl alcohol. Specifications, lot certificates and samples are quoted against a named application and a named market through our contact page.