When buying food grade silicone oil, first specify where it will be used: in food processing to control foam, or at an equipment lubrication point where incidental food contact is possible. These uses have different formulation requirements, restrictions and documentation. The words “food grade”, a clear appearance or an SDS alone do not establish suitability for a particular process.

This article uses US 21 CFR 173.340 and 21 CFR 178.3570 to illustrate how to check intended use. For other markets, check the applicable local requirements separately; the US provisions cited here cannot simply be applied elsewhere.

State the application before requesting a quotation

The last application cannot be assessed from the defoamer or lubricant provisions alone. Once the raw material is incorporated into an article, requirements must still be checked for the finished article and target market.

IOTA Silicone Oil (Anhui) Co., Ltd. provides solutions across the silicone value chain. For initial material screening, consult the IOTA silicone oil product categories, then provide the specific food processing or equipment operating conditions.

Defoaming and lubrication provisions cover different uses

US 21 CFR 173.340 covers defoaming agents used in food processing, including composition and use restrictions. Its listing of dimethylpolysiloxane includes material conditions and limits in food, with exceptions for specific foods. A single general dosage cannot be taken from this provision and applied to every food. [1]

21 CFR 178.3570 covers lubricants with incidental food contact, specifying the relevant equipment uses and composition conditions. Its listing of dimethylpolysiloxane includes viscosity limits and limits on the amount entering food. [2] Suitability for mechanical lubrication does not establish that a silicone oil may be added to a food process as a defoamer.

This article gives no universal addition rate. Actual dosage must be confirmed against the specific food, complete formulation, applicable provisions and actual contact conditions. The listing of one ingredient does not establish compliance of the entire formulated product.

Check the documents against the actual product and process

1. Match the product name, grade, manufacturer and document versions. If a quotation and test report use different names, obtain a statement linking the two identities before proceeding.

2. Request a statement of compliance for the intended use of the complete product, specifying the target market, use and restrictions. A general claim such as “FDA compliant” needs a specific supporting basis.

3. Check the stated scope against actual conditions, including food category, process temperature, method of addition or contact, and how dosage is controlled.

4. Review the batch COA against the agreed specification. A TDS provides technical information; an SDS communicates hazards and safe handling. Neither alone replaces documentation of suitability for the intended use.

5. If third party registration or testing is supplied, verify the issuing body, product identity, current validity, test items and conditions. A document title is not authorization for every operating condition.

Sample trials must check performance and use restrictions

A successful defoaming trial does not replace verification of eligibility for the intended use. If the emulsifier, carrier or another formulation ingredient changes, review the complete product documentation and scope again. The base silicone oil documentation alone cannot be carried over to the new formulation.

Frequently asked questions

Q1 Can food grade silicone oil be consumed directly

The name “food grade” does not establish that a product may be consumed directly. Check its specific use, food category and applicable restrictions.

Q2 Can silicone oil for food equipment lubrication be used as a defoamer

The basis for use as a food processing defoamer must be checked separately. Equipment lubrication documents cannot be reused as the justification.

Q3 Does an SDS establish compliance for food use

An SDS mainly communicates hazards and safe handling. The actual product, intended use documentation and operating conditions must also be checked.

Q4 Is an emulsion suitable if its silicone oil ingredient meets the requirements

An emulsion contains other ingredients. Assess the complete formulation and corresponding restrictions rather than relying only on the base silicone oil.

Q5 Is the claim FDA certified appropriate

Describe the applicable provisions and use accurately, based on specific evidence. A broad certification claim does not replace checks of the product and its conditions of use.

Q6 Can IOTA recommend a grade for food use immediately

First provide the target market, food category, application point and process conditions. The information currently available is insufficient to identify a grade with confirmed eligibility for food use. Select samples after the relevant documentation has been verified.

Related products

IOTA silicone oil product categories for initial screening by material type.

Sources and scope

1. US 21 CFR 173.340 on defoaming agents used in food processing.

2. US 21 CFR 178.3570 on lubricants with incidental food contact.

3. IOTA silicone oil product categories.