Does E-1309 identify one fixed isotridecyl alcohol ethoxylate molecule?

No. E-1309 normally denotes an isotridecyl alcohol ethoxylate with a nominal average of about nine EO units. It is a distribution of alcohol isomers and ethoxylate-chain lengths, not one discrete molecule. Confirm the offered grade’s average EO designation, active content, cloud point, hydroxyl value and stated methods.

Can another isotridecyl alcohol ethoxylate with CAS 9043-30-5 replace E-1309 directly?

Not without comparison. CAS 9043-30-5 is used for isotridecyl alcohol ethoxylates across different EO levels and commercial presentations. Even grades described as 9 EO can differ in active content and test profile. Compare the agreed controls, then assess wetting, emulsification, foam and phase behaviour in the intended system.

Does the E-1309 designation establish acceptance for every destination and end use?

No. A grade designation and CAS number do not establish regulatory acceptance for a particular market, mixture or end use. Identify the destination and intended application first, then review applicable requirements and the documentation for the actual offered grade. This is separate from confirming its formulation performance.

Isotridecyl Alcohol Ethoxylate E-1309 CAS 9043-30-5

Isotridecyl Alcohol Ethoxylate E-1309 (CAS 9043-30-5, EC/List No. 500-027-2) is a branched C13 alcohol ethoxylate with a nominal average of about nine ethylene-oxide units. It is a nonionic surfactant distribution, not a single compound with one fixed molecular formula. E-1309 grades are evaluated for wetting, detergency, emulsification and oil removal in industrial cleaning, textile and metal-treatment formulations. Confirm active matter, nominal EO level, hydroxyl value, water, pH, physical form and the cloud-point method and range in the current TDS and COA before comparing sources.

CAS: 9043-30-5
Synonyms: Isotridecanol ethoxylate; Isotridecyl alcohol polyoxyethylene ether; Branched C13 alcohol ethoxylate; E-1309 nonionic surfactant
Einecs: 500-027-2
Molecular Formula: C13H27O(C2H4O)nH, nominal n≈9 for E-1309 (average distribution; no single molecular formula)
Grade: Confirm active matter, nominal EO level, hydroxyl value, water, pH and cloud-point test method
Package: Confirm current packaging, net weight and destination requirements for the offered form

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Product Description

1 Product overview

2 Technical information

3 Handling and documentation

Product overview

Isotridecyl Alcohol Ethoxylate E-1309 (CAS 9043-30-5; legacy EC entry 500-027-2) is a branched nonionic alcohol ethoxylate used for wetting, detergency, emulsification, penetration and dispersion in industrial cleaning, textile and leather auxiliaries, metal processing and specialty formulations. E-1309 commonly denotes an isotridecyl alcohol ethoxylate with approximately nine ethylene-oxide units, but the material is an average chain-length distribution rather than a single molecule. Identify it as C13H27O(C2H4O)nH with nominal n≈9 rather than a fixed molecular formula. Evaluate the offered grade by active matter, EO distribution, hydroxyl value, cloud-point method, water, pH, appearance and low-temperature behavior; do not use a generic 99% molecular-purity claim. Confirm current packaging, net weight and handling requirements in the quotation. Use the exact supplied-product SDS and destination-market classification.

Technical information

Product	Isotridecyl Alcohol Ethoxylate E-1309 CAS 9043-30-5
CAS number	9043-30-5
EC / list number	500-027-2
Molecular formula / identity	C13H27O(C2H4O)nH, nominal n≈9 for E-1309 (average distribution; no single molecular formula)
Synonyms	Isotridecanol ethoxylate; Isotridecyl alcohol polyoxyethylene ether; Branched C13 alcohol ethoxylate; E-1309 nonionic surfactant
Grade	E-1309 surfactant grade, nominally about 9 EO; active matter and EO distribution per specification and batch COA, not molecular purity
Packaging	Confirm current container, net weight, material compatibility and temperature-handling requirements in the quotation

Handling and documentation

Specifications may vary by grade and batch. Confirm the current TDS, COA and SDS before purchase or use. Store and handle the product in accordance with the SDS and applicable site procedures.

FAQ - Technical & Supply Chain

Q:
Does E-1309 identify one fixed isotridecyl alcohol ethoxylate molecule?

A: No. E-1309 normally denotes an isotridecyl alcohol ethoxylate with a nominal average of about nine EO units. It is a distribution of alcohol isomers and ethoxylate-chain lengths, not one discrete molecule. Confirm the offered grade’s average EO designation, active content, cloud point, hydroxyl value and stated methods.
Q:
Can another isotridecyl alcohol ethoxylate with CAS 9043-30-5 replace E-1309 directly?

A: Not without comparison. CAS 9043-30-5 is used for isotridecyl alcohol ethoxylates across different EO levels and commercial presentations. Even grades described as 9 EO can differ in active content and test profile. Compare the agreed controls, then assess wetting, emulsification, foam and phase behaviour in the intended system.
Q:
Does the E-1309 designation establish acceptance for every destination and end use?

A: No. A grade designation and CAS number do not establish regulatory acceptance for a particular market, mixture or end use. Identify the destination and intended application first, then review applicable requirements and the documentation for the actual offered grade. This is separate from confirming its formulation performance.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

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COA, TDS, SDS/MSDS and packing details are available on request.

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