4-Methyl-5-nonanol

4-Methyl-5-nonanol (CAS 154170-44-2) is a C9 alcohol used as a semiochemical component in surveillance and IPM work against red palm weevil.

The only target recorded in our file is red palm weevil (Rhynchophorus ferrugineus) — which is why the material is held for surveillance work rather than as general stock.

Programme use is blend-first. The compound is formulated with the other components recorded for the same complex, and the ratio — not the total loading — is what field results usually track.

Where it is used

This material sits in the working part of the catalogue: the compounds formulation teams ask for by CAS when a blend needs a specific isomer, a reference point for a chromatogram, or a small quantity to test before committing to a drum.

Isomer, stability and handling

Alcohols are comparatively stable but hygroscopic. Small water uptake is enough to move a release rate over a long flight season, so keep containers sealed and dry between weighing operations.

Store cool, dry and dark: sealed under nitrogen or argon at −20 °C for holdings longer than one season, and let containers reach room temperature before opening so condensation does not enter the material. Weigh and formulate in a ventilated area; the safety data sheet gives handling detail for the neat substance.

Documentation and packing

Documentation is lot-based: certificate of analysis, GC trace and safety data sheet travel with the consignment, and an isomer-ratio statement can be added where a specification calls for it.

Standard packing for this line is 1kg / 25kg / 50kg, with smaller development quantities available so a blend can be trialled before a bulk order. Lead time is confirmed at quotation.

Specification

Product name	4-Methyl-5-nonanol
CAS number	154170-44-2
Molecular formula	C10H22O
Molecular weight	158.28 g/mol
Chemical class	Alcohol
Function	Semiochemical component
Assay and isomeric purity	Stated per lot on the certificate of analysis
Standard packing	1kg / 25kg / 50kg
Development quantity	Available on request, below standard pack
Lead time	Confirmed at quotation
Catalogue reference	S3-154170-44-2

Target species recorded against this compound

• red palm weevil Rhynchophorus ferrugineus

Species records are drawn from the blend literature filed for this material. Where a programme targets a species not listed, the blend is usually a ratio question rather than a different compound — send the target and we will confirm.