Citric Acid Caster Compatibility

Chemical Overview

Molecular Formula: C₆H₈O₇

Physical Properties: Citric acid is a white crystalline powder or granules, odorless, with a density of 1.66 g/cm³ and a melting point of 153°C. It is highly soluble in water and mildly acidic. (Source: PubChem)

Industrial Applications

Citric acid is used in food and beverage processing, pharmaceuticals, and cleaning agents. Caster wheels may be exposed in food production facilities or during handling of citric acid solutions.

Wheel Material Compatibility Summary

Best Suited (A/B): Polyolefin, Nylon, Nylon Glass Filled, and Polyurethane on Aluminum Core are highly resistant to citric acid.

Avoid (C/D): Avoid Ductile Cast Iron and V-Grooved Iron due to potential mild corrosion.

Wheel Compatibility Table

Wheel Material	Interaction Description	Rating
Ductile Cast Iron	Mild corrosion possible with prolonged exposure.	C
Elastomer	Highly resistant; no significant effect.	A
Forged Steel	Mild corrosion risk; generally resistant.	B
Neoprene/Nylon Glass Core	Both components resist; highly stable.	A
Nylon	Excellent resistance; chemically stable.	A
Nylon Glass Filled	Highly resistant; no degradation.	A
Phenolic	Excellent resistance; no effect.	A
Polyolefin	Excellent chemical inertness.	A
Polyurethane on Aluminum Core	Highly resistant; aluminum unaffected.	A
Polyurethane on Iron Core	Polyurethane resists; iron core may corrode slightly.	B
Rubber	Resistant; no significant degradation.	A
Solid Elastomer	Highly resistant; no effect.	A
Thermoplastic Rubber	Resistant; minimal softening possible.	B
Urethane	Excellent resistance; chemically stable.	A
V-Grooved Iron	Mild corrosion possible; not ideal for long-term exposure.	C

Conclusion

Citric acid is mildly acidic and compatible with most caster wheel materials. Polyolefin, Nylon, and Polyurethane-based wheels are ideal, while metal-based wheels like Ductile Cast Iron should be used cautiously. For further assistance, contact us at CasterTech.