Does SPO-30 describe one fixed molecular structure?

SPO-30 is a commercial grade designation. CAS 74499-34-6 identifies the C12–C15 propoxylated-alcohol family, which contains distributions of alkyl groups and propoxy chain lengths. A nominal PO level describes an average addition level, rather than an identical PO count in every molecule. The quotation and grade specification state the applicable nominal PO level and quality limits.

Can SPO-30 replace a fatty alcohol ethoxylate directly?

A direct replacement is not established by matching the CAS number or a grade designation. Propoxylated and ethoxylated alcohols differ in their alkoxylate structure, and starting-alcohol and chain-length distributions also matter. Compare compatibility, wetting, viscosity and foam at the intended concentration and temperature before choosing the grade and dosage.

C12-15 Alcohol Propoxylate SPO-30 CAS 74499-34-6

SPO-30 (CAS 74499-34-6), also known as C12–15 Alcohol Propoxylate or Fatty Alcohol Polyoxypropylene Ether, is a mixture obtained by propoxylating C12–C15 fatty alcohols. This nonionic polyether is used as a lubricity aid and dispersing component in oil-based formulations, and as an intermediate for chemical synthesis. Hydroxyl value, water content, acid value, viscosity and physical form help define the appropriate grade for formulation and handling. We can provide a Certificate of Analysis (COA), Technical Data Sheet (TDS) and Safety Data Sheet (SDS) to support specification review and product selection.

CAS: 74499-34-6
Synonyms: C12-15 Alcohol Propoxylate, Alcohols C12-15 Propoxylated, Fatty Alcohol Polyoxypropylene Ether, SPO-30, Propoxylated Fatty Alcohol
Molecular Formula: C12-15 alcohol propoxylate distribution; no single molecular formula
Grade: Specified by the C12–C15 alcohol distribution, nominal PO level, hydroxyl value, water content, acid value, viscosity and appearance; quality limits are stated in the quoted grade specification.
Package: Packaging, net weight and any bulk-delivery arrangements are specified in the quotation for the required grade and destination.

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Product Description

1 Identity and grade selection

2 Industrial applications

3 Quality controls and analytical information

4 Related polyether comparisons

5 Storage and handling

6 Request a quotation

Identity and grade selection

Item	Product information
Product identity	Alcohols, C12–15, propoxylated; commercial designation SPO-30
CAS number	74499-34-6
Composition	Nonionic fatty alcohol propoxylate with a distribution of C12–C15 alkyl groups and propoxy chain lengths; no single molecular formula
Grade selection	Nominal PO level, hydroxyl value, water content, acid value, viscosity, appearance and formulation compatibility
Oil/water compatibility and foam	Depend on the grade and formulation conditions; assessed at the intended concentration and operating temperature

Industrial applications

C12–C15 alcohol propoxylates are used in industrial lubricant and functional-fluid formulations, cleaning formulations and fuel-additive systems. For SPO-30 selection, match the specified hydroxyl value and viscosity to the formulation and handling requirements, then evaluate compatibility, lubricity or dispersion performance in the intended system.

Quality controls and analytical information

The agreed grade specification and COA define the quality limits and test methods. Useful controls for specification review include:

Hydroxyl value: measured by a suitable hydroxyl-group titration and reported in mg KOH/g. It characterizes hydroxyl content and grade consistency; it does not by itself establish the full propoxylate distribution.
Water content: determined by Karl Fischer titration with a method suitable for the sample matrix; reported as mass % or mg/kg on the stated basis.
Acid value: reported in mg KOH/g using a suitable titration, with the method and endpoint specified.
Viscosity: reported with the measurement temperature and method. Dynamic viscosity in mPa·s and kinematic viscosity in mm²/s are different quantities.
Appearance and color: compared with the agreed grade specification, with the observation or measurement conditions recorded where relevant.

For specifications that include residual-volatile requirements, targeted headspace-GC chromatograms and test information can be provided. Quantitative results require calibration for the specified analytes in the polyether matrix, with the reporting limit stated. This analysis concerns the named volatile residues; it does not measure the purity of the complete propoxylate mixture.

Related polyether comparisons

For alcohol alkoxylate selection, compare the propoxylated structure of SPO-30 with Isotridecyl Alcohol Ethoxylate, 2-Ethylhexanol Ethoxylate and AEO-20 / MOA-20. These ethoxylated grades have different starting alcohols and alkoxylate profiles. Compare compatibility, wetting, viscosity and foam in the same formulation before selecting a replacement.

PPG-1000 provides a separate polyether comparison: a polypropylene glycol diol has two hydroxyl end groups, while an ideal fatty-alcohol-initiated propoxylate chain has one terminal hydroxyl group. Their functionality and starting groups differ, so hydroxyl values and formulation proportions are not interchangeable.

Storage and handling

Keep containers closed and protect the product from moisture and contamination. Storage temperatures and any warming or homogenization instructions are specified in the TDS for the quoted grade. Follow the supplied SDS for protective equipment, transport, spill response and disposal.

Request a quotation

Send the intended application and quantity for a quotation. If available, include a target hydroxyl value or reference specification, packaging preference and destination; these details help match the required grade and delivery arrangement.

FAQ - Technical & Supply Chain

Q:
Does SPO-30 describe one fixed molecular structure?

A: SPO-30 is a commercial grade designation. CAS 74499-34-6 identifies the C12–C15 propoxylated-alcohol family, which contains distributions of alkyl groups and propoxy chain lengths. A nominal PO level describes an average addition level, rather than an identical PO count in every molecule. The quotation and grade specification state the applicable nominal PO level and quality limits.
Q:
Can SPO-30 replace a fatty alcohol ethoxylate directly?

A: A direct replacement is not established by matching the CAS number or a grade designation. Propoxylated and ethoxylated alcohols differ in their alkoxylate structure, and starting-alcohol and chain-length distributions also matter. Compare compatibility, wetting, viscosity and foam at the intended concentration and temperature before choosing the grade and dosage.

Ordering & Documentation

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

Documents

Tell us which documents your procurement team needs. Before an order, we will check whether the quoted source can provide them for the offered lot.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Ask whether samples, trial quantities or repeat orders are possible. We will check each request against the sourced product and current offer.

Storage & Shipping

Product-specific conditions are confirmed before order.

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