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Calcium Distearate (Calcium Stearate)

  • Thickeners
  • CAS 1592-23-0
  • IUPAC: Calcium distearate

Calcium Distearate (Calcium Stearate) (CAS 1592-23-0) appears in 1 of the 1,812 car-care products CarCareTruth tracks (as of June 2026).

Calcium distearate is generally recognized as low-acute-hazard. No H-codes at typical use concentrations in paste anti-seize. High inhalation LC50 values (>2000 mg/m³ in rat studies). Not classified as a carcinogen, sensitizer, or asthmagen. Nuisance dust only at elevated inhalation concentrations.

Calcium distearate (CAS 1592-23-0), also known as calcium stearate, is a calcium soap thickener formed from stearic acid (an 18-carbon saturated fatty acid) and calcium. It is widely used as a thickener and water-repellent agent in industrial greases, including calcium sulfonate-based formulations used in marine-grade anti-seize compounds.

In anti-seize applications, calcium distearate contributes to the paste body and helps maintain consistency across the operating temperature range. The calcium soap structure provides mild water resistance, which is part of why calcium sulfonate-based greases are favored in marine and high-humidity environments.

Calcium distearate has a benign health profile at typical use concentrations. It is not classified as a carcinogen, sensitizer, or asthmagen under GHS. The primary concern is nuisance dust if the dry powder is inhaled at elevated concentrations — not relevant in paste applications.

Health & environment profile

VOC
no
Prop 65 listed
no
Asthmagen
no
EPA Safer Choice
no
Aquatic toxicity
no
Biodegradable
no
Bioaccumulative
no
Persistent
no
Ozone depleting
no
Microplastic
no
PFAS
no
Env. score
4/5
Purpose: Metallic soap thickener in calcium-based greases and anti-seize compounds; provides consistency and water-resistance to the paste matrix

Common questions about Calcium Distearate (Calcium Stearate)

What is Calcium Distearate (Calcium Stearate) used for in car care?
Metallic soap thickener in calcium-based greases and anti-seize compounds; provides consistency and water-resistance to the paste matrix
Is Calcium Distearate (Calcium Stearate) a VOC?
No. Calcium Distearate (Calcium Stearate) is not classified as a volatile organic compound (VOC).
Is Calcium Distearate (Calcium Stearate) on California's Proposition 65 list?
No. Calcium Distearate (Calcium Stearate) is not on California's Proposition 65 list.

1 product contain this

Related

Health and environment notes translate the manufacturer Safety Data Sheet, the GHS classification, and authoritative regulatory listings (California Prop 65, EPA). Not medical advice. They describe the ingredient itself; whether a hazard applies to a finished product depends on its concentration and how it's used.