Brand Name: GuardExo BPZ 550
Brand Company: Chemtiver
Active Ingredients:
BIT (1,2-Benzisothiazolin-3-one)
ZPT (Zinc Pyrithione)
Form: Aqueous dispersion (typically grayish-white or off-white, flowable)
Dual Action Formula: Combines fast-acting, broad-spectrum antimicrobial BIT with the long-lasting antifungal and bacteriostatic properties of ZPT.
Comprehensive Protection: Effective against bacteria, fungi, molds, and algae.
Low VOCs: Free from formaldehyde, CMIT, and MIT—an environmentally conscious formulation.
Excellent Stability: Heat-stable and active across a broad pH range (approx. 4.5–11) with no volatility concerns.
| Property | Typical Specifications |
|---|---|
| Appearance | Grayish-white to off-white aqueous dispersion |
| Specific Gravity | ~1.05–1.15 (H₂O = 1) |
| pH (as supplied) | ~4.0–8.0 |
| Viscosity @25 °C | ~2400–4800 mPa·s |
| BIT Content | 5.5% (active) |
| ZPT Content | 5.5% (active) |
| Stability | Heat stable, non-volatile, stable across broad pH |
| Incompatibilities | Avoid strong chelating agents (e.g., EDTA), cationic or non-ionic surfactants (may precipitate ZPT) |
BIT: Penetrates microbial cell walls and disrupts essential proteins, resulting in rapid antimicrobial efficacy.
ZPT: Disrupts fungal and bacterial cell membranes, inhibiting cell division and providing persistent fungistatic and bacteriostatic activity.
Recommended Applications:
In-can and dry-film preservatives for coatings and paints
Industrial polymer emulsions
Water-based adhesives
Printing inks and pigment slurries
Textile auxiliaries
Typical Dosage Levels (active basis):
0.05–0.45% (w/w): For broad-spectrum preservation of emulsions, adhesives, inks, and auxiliaries
0.1–0.8%: For printing inks and related applications (BIT + ZPT blended use)
Storage Conditions: Store in sealed containers in a cool, dry, well-ventilated area. Avoid direct sunlight and reactive substances.
Shelf Life: Typically 12 months under recommended storage conditions.
GuardExo BPZ 550 is a robust, dual-action antimicrobial preservative designed for modern industrial needs. Combining the fast-kill action of BIT with the long-term protection of ZPT, it offers broad-spectrum efficacy, formulation compatibility, and outstanding stability. Ideal for coatings, adhesives, emulsions, and inks, it ensures long-term microbial control with reduced environmental impact. Proper handling and regulatory compliance are essential for safe and effective use.
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