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Canola oil, cold pressed

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Catalog Number CI-EO-0007
Product Name Canola oil, cold pressed
CAS 120962-03-0
Synonyms Canola oil
Purity 0.98
Appearance Liquid
Case Study

Effect of Electrolytes in Canola Oil/Water Nanoemulsion Systems

de Morais, Jacqueline Moreira, et al. Journal of dispersion science and technology, 2006, 27(7), 1009-1014.

The aim of this study was to evaluate the effects of commonly used hydrolyzable raw materials in pharmaceutical and/or cosmetic formulations, including surfactants, salts/cations and salts/anions, on the potential and droplet size distribution of rapeseed oil/water nanoemulsions. The results showed that the additives affected the interfacial structure of the droplet emulsions without affecting the macroscopic stability. The zeta potentials obtained before and after the tests indicated that the emulsion stability was not entirely dependent on electrostatic stability. Therefore, these nanoemulsion systems obtained by an emulsion inversion method with a pair of nonionic surfactants could be used to develop pharmaceutical and/or cosmetic dosages that require high levels of hydrolyzable active substances.
Preparation of emulsions
· Emulsions were prepared using the emulsion phase inversion (EPI) method. A surfactant blend of PEG-40 castor oil (3.58% w/w) and sorbitan oleate (2.42% w/w) was used, totaling 5.0% w/w and yielding an HLB of 8.8. Both surfactants were dissolved in the canola oil phase (5.0% w/w). The oil and aqueous phases (90.0% w/w) were heated to 70 ± 2°C and then slowly mixed at 400 rpm until reaching room temperature (25 ± 2°C).
· The phase inversion temperature (PIT) of the surfactant blend (Surfom R-400w and Span 80w) was previously determined to be above 90°C by measuring conductivity changes in an O/W emulsion upon heating. Additives were incorporated into the O/W emulsions at concentrations of 0.1%, 0.5%, and 1.0% (with an additional 0.25% for the cationic surfactant to identify the charge reversal point). Additives were added immediately after emulsion preparation, and analyses were conducted 48 hours later to allow for equilibrium adsorption of dissociated ions onto the O/W interface.

Antioxidant Activity and Interactions of Rapeseed and Soybean Oil Emulsion Systems

Winkler-Moser, et al. European Journal of Lipid Science and Technology, 2014, 116(5), 606-617.

This study aimed to investigate how tocopherol (TOH) homologues (α- and γ-TOH) interact in a sequence of water-in-oil (o/w) emulsions made with rapeseed oil (CO) and soybean oil (SBO), the obtained data that could be applied to decide the correct level and proportion of tocopherol for protective emulsions based on oil type. It was examined the oxidative stability of α- and γ-TOH levels on their own and in mixtures in relation to the CO and SBO TAGs' fatty acid profiles in two batches of water-in-oil (o/w) emulsions treated with increased oxidative pressure (50°C in the dark).
Key conclusions
· The overall formation rates of hydroperoxide and hexanal were found to be lower in CO compared to SBO.
· In CO emulsions, γ-TOH acted as a more potent antioxidant than α-TOH, with their combined effect proving to be additive.
· In SBO emulsions, on the other hand, at lower concentrations α-TOH was more antioxidant while at higher concentrations γ-TOH was.
· This α- and γ-TOH interaction was synergistic at low concentrations, but switched to additive or antagonistic effect at higher concentrations, depending on the ratios and concentrations of the two tocopherols.
· In both CO and SBO emulsions, the effectiveness of α-TOH diminished at elevated concentrations, while the efficacy of γ-TOH increased with higher concentrations.

Custom Q&A

What is the chemical property of Canola oil in terms of color and taste?

Canola oil is a clear, light yellow-colored oily liquid with a bland taste.

How is Canola oil obtained?

Canola oil is obtained by mechanical expression or n-hexane extraction from the seeds of specific species of Brassica plants.

What is the main use of Canola oil in pharmaceutical formulations?

Canola oil is mainly used in topical preparations such as soft soaps and liniments in pharmaceutical formulations.

How is Canola oil stored to maintain its stability?

Canola oil should be stored in an airtight, light-resistant container in a cool, dry place. Contact with metals should be avoided and containers should be filled to the top or flushed with nitrogen.

What are some potential off-flavors that can develop in Canola oil during storage?

Grassy, paintlike, or rancid off-flavors can develop in Canola oil during storage.

What factors can affect sediment formation in Canola oil during storage?

Factors such as temperature and storage conditions can affect sediment formation in Canola oil.

How does the reduction in linolenic acid content affect the oxidation of Canola oil at frying temperatures?

Reduction in linolenic acid content of Canola oil reduces the development of off-flavors at frying temperatures.

What regulatory bodies have accepted Canola oil for use in cosmetics and foods?

Canola oil has been accepted for use by the FDA in cosmetics and foods.

What is the maximum allowable amount of erucic acid specified by the FDA in Canola oil products?

The FDA specifies 165.55 mg as the maximum amount of erucic acid for each route or dosage form containing Canola oil.

What toxic substances are present in conventional rapeseed oil that are reduced in Canola oil?

Conventional rapeseed oil contains large amounts of erucic acid and glucosinolates, which are toxic to humans and animals but are reduced in Canola oil.

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