Vac-11 Pastilles (Pentaerythritol-bis-tetrahydrobenzaldehyde acetal)


Vac-11 Pastilles

General Product Properties

CAS #: 6600-31-3
EC #: 229-542-8
Formula: C19H28O4
Formula Weight: 320.43 g/mol
Melting Point: 90°C/ 194°F
Physical State: Solid- Pastilles
Appearance: Beige / Brown


Vac-11 (3,9-dicyclohex-3-enyl-2,4,8,10-tetraoxaspiro(5,5)undecane) is a cyclic acetal (pentaerythritol-bis-tetrahydrobenzaldehyde acetal). Product Overview: Nonstaining antiozonant, excellent dynamic protection and excellent antioxidant protection. Protect vulcanizates where color and design play a major role, perfectly suit for light-color and color rubber products, will not change products’ color.


16.5 Gallon All Fiber Drum, 25 KG, net.

Storage and handling guidelines

Keep container tightly closed in a dry and well-ventilated place. Keep cool (approximately 25 °C).  Shelf-life: 2 years

Regulatory Information

Reference: Cymer SDS VAC-11 (Pastilles)

  • VAC-11 I non-staining property makes it possible to be used in light-color or color products , especially high-level rubber products, such as
    • Profiles, hose, seal, cable, auto parts
    • IIR tube, cycle tire, white sidewall, color tire
    • Sneakers and other leisure products
  • (3,9-dicyclohex-3-enyl-2,4,8,10-tetraoxaspiro
    (5,5)undecane) VAC-11is highly effective in CR, C IIR
    and BIIR, even without wax.
  • Also used in NR, SBR or blended rubber, and IIR/CR
    (95/5) blended rubber or inner rubber.
  • No protection from heat oxidation, flexing
    resistance, or rubber poisons, need to synergies with
    other anti-aging agents.


Minimum Maximum
Purity by GC
(% area normalization)
Loss on Drying, % 1.0
Residue on Ignition , % 0.1
Melting point, ̊C 85 95
Appearance off-white color pastilles

These figures are given as a guide. Full specifications available on request.


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