Does CAS 9043-30-5 define one isotridecyl alcohol ethoxylate grade?

No. The CAS covers a family with different nominal EO levels and distributions. It does not determine HLB, cloud point, hydroxyl value, physical form, or performance. Specify those attributes and their test methods when comparing an offered grade.

Can a branched isotridecyl ethoxylate be exchanged with a linear alcohol ethoxylate?

Not by name alone. Branching and EO level affect wetting, foam, oil affinity, and phase behavior. Compare candidates at the actual dosage, temperature, water quality, and electrolyte level used in the intended formulation.

Isotridecyl Alcohol Ethoxylate CAS 9043-30-5

Isotridecyl Alcohol Ethoxylate (CAS 9043-30-5), also called polyoxyethylene isotridecyl ether or ethoxylated isotridecanol, is a family of nonionic surfactants made from branched C13 alcohol and ethylene oxide. These surfactants are used for wetting, detergency, emulsification and degreasing in cleaning, textile and leather-processing formulations. Nominal EO number, hydroxyl value, cloud-point test method and active-matter content help distinguish grades, alongside performance in the intended formulation. COA, TDS and SDS are available for specification and handling information.

CAS: 9043-30-5
Synonyms: Isotridecanol Ethoxylate, Polyoxyethylene Isotridecyl Ether, Ethoxylated Isotridecanol, Tridecyl Alcohol Ethoxylate, POE Isotridecyl Ether
Molecular Formula: RO-(CH₂CH₂O)ₙ-H; R is a branched C13 alkyl group and n varies across the EO distribution.
Grade: Specified by nominal EO number, hydroxyl value, active matter, water, appearance, pH and cloud point, with the relevant test conditions in the TDS and COA.
Package: Drum or bulk packaging; container type and net weight are specified in the quotation.

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Product Description

1 Physicochemical profile

2 Quality and analytical information

3 Applications and grade selection

4 Storage, handling and quotations

Physicochemical profile

Item	Grade information
Product identity	Isotridecyl alcohol ethoxylate, a family of nonionic surfactants based on branched C13 alcohol
CAS / EC reference	CAS 9043-30-5; EC 500-027-2 is a family reference, not a specification for one EO grade
Composition	A distribution of ethoxylated C13 alcohols; nominal EO is an average addition level and does not mean every molecule has the same EO chain length
Structural formula	RO-(CH₂CH₂O)ₙ-H, where R is branched C13 alkyl and n varies; the family has no single fixed molecular weight
Physical form	Liquid, paste or waxy material depending on EO level, water content and temperature
Grade selection	Nominal EO number, hydroxyl value, active matter, water and cloud point under specified test conditions

Quality and analytical information

Hydroxyl value is reported in mg KOH/g and helps distinguish EO grades; it does not describe the full EO distribution. Water content can be determined by Karl Fischer titration using a method suitable for the sample. Active matter describes concentration, not the purity of one molecule. Cloud-point data need the solution concentration, medium and test method: results in water, salt solution and glycol-containing media are not directly interchangeable.

COA (Certificate of Analysis), TDS (Technical Data Sheet) and SDS (Safety Data Sheet) can be provided for the selected grade. For applications with residual-impurity requirements, reports for residual ethylene oxide and 1,4-dioxane can also be provided. Targeted headspace GC methods suitable for alcohol ethoxylates are used with validation for the sample matrix and required limits. Reports identify the analyte, result in mg/kg, supplied-product or active-matter basis, method and detection or quantification limits. These trace-residue measurements do not establish a single-peak GC purity for the whole ethoxylate mixture.

Applications and grade selection

These nonionic surfactants are used for wetting, detergency, emulsification and degreasing in industrial cleaning, textile and leather-processing formulations. EO level and its distribution influence water solubility, cloud point, foam and oil affinity. Selection depends on the complete formulation and operating conditions.

For cleaning formulations, compare wetting, detergency, foam, rinsing and hard-water performance at the intended dosage and temperature.
For textile and leather processing, evaluate substrate wetting, compatibility, scouring or degreasing performance and finished-material quality.
Personal-care and other regulated applications need a grade selected against the relevant impurity limits and target-market requirements.

For specific grades within the branched C13 family, compare E-1307 isotridecyl alcohol ethoxylate and E-1309 isotridecyl alcohol ethoxylate. Their nominal EO levels differ; the shared CAS number does not establish the same cloud point, concentration or formulation performance.

When comparing alcohol ethoxylate families, AEO-7 C12–C14 alcohol ethoxylate and Laureth-4 offer different feedstock and EO profiles. They are comparison candidates for wetting or emulsification, not automatic substitutes; evaluate foam, phase behavior and compatibility in the actual formulation.

Storage, handling and quotations

Keep containers closed in a dry, ventilated place away from excessive heat and contamination. Temperature can change viscosity or physical form. Follow the grade-specific TDS for conditioning, mixing and sampling, and the SDS for personal protection, handling, transport and disposal.

For a bulk quotation, send the product name or CAS number, quantity and destination. A reference EO grade or specification, or the intended application, helps select a suitable option. Packaging, net weight and essential analytical requirements are included in the quotation.

FAQ - Technical & Supply Chain

Q:
Does CAS 9043-30-5 define one isotridecyl alcohol ethoxylate grade?

A: No. The CAS covers a family with different nominal EO levels and distributions. It does not determine HLB, cloud point, hydroxyl value, physical form, or performance. Specify those attributes and their test methods when comparing an offered grade.
Q:
Can a branched isotridecyl ethoxylate be exchanged with a linear alcohol ethoxylate?

A: Not by name alone. Branching and EO level affect wetting, foam, oil affinity, and phase behavior. Compare candidates at the actual dosage, temperature, water quality, and electrolyte level used in the intended formulation.

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