(3Z,13Z)-Octadeca-3,13-dien-1-ol
Sequoia pitch moth, Poplar clearwing moth +1 more
3 recorded targets(2E,13Z)-Octadeca-2,13-dien-1-ol
CAS 123551-47-3 Alcohol blend component with recorded targets
(2E,13Z)-Octadeca-2,13-dien-1-ol (CAS 123551-47-3) is a C18 alcohol with a 2E,13Z double-bond geometry used as a female sex pheromone component in surveillance and IPM work against Hornet moth / Hornet clearwing and other species. It is a defined isomer rather than a mixture, which is what a blend specification normally asks for.
Our file records 2 targets for this material — Hornet moth / Hornet clearwing (Sesia apiformis); Long-legged clearwing moth (Macroscelesia longipes) — spanning clearwing moths. That is why it is held for surveillance and programme work rather than as general stock.
In practice it is used as one component of a multi-component blend rather than on its own: loaded on a rubber septum, a polyethylene vial or a membrane dispenser, then deployed with the trap type that suits the target’s flight behaviour.
Inside a clearwing programme
Clearwing moths are borers: larvae work inside cambium and bark, so symptoms appear long after an infestation is established. That makes pheromone trapping the practical early-warning tool. (2E,13Z)-Octadeca-2,13-dien-1-ol is used in the blends recorded for Synanthedon, Sesia and Paranthrene species.
Trap placement follows the host rather than the fence line — trunk-height traps on the sunny side of susceptible trees, checked weekly through the flight period. Nursery and plantation programmes usually run one blend across a block so blocks can be compared rather than individual trees.
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 / 100kg, with smaller development quantities available so a blend can be trialled before a bulk order. Lead time is confirmed at quotation.
Specification
| Product name | (2E,13Z)-Octadeca-2,13-dien-1-ol |
|---|---|
| CAS number | 123551-47-3 |
| Molecular formula | C18H34O |
| Molecular weight | 266.5 g/mol |
| Chemical class | Alcohol |
| Function | Female sex pheromone component |
| Assay and isomeric purity | Stated per lot on the certificate of analysis |
| Standard packing | 1kg / 25kg / 100kg |
| Development quantity | Available on request, below standard pack |
| Lead time | Confirmed at quotation |
| Catalogue reference | S3-123551-47-3 |
Target species recorded against this compound
- Hornet moth / Hornet clearwing Sesia apiformis
- Long-legged clearwing moth Macroscelesia longipes
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.