The Span series — sorbitan esters from Span 20 to Span 85 — covers HLB 1.8 to 8.6, making it the most complete low-HLB emulsifier family in food manufacturing. At FoodEmul, sorbitan esters are half of our core product line, paired with polysorbates to cover the full emulsifier spectrum. This guide covers the complete Span series: chemistry, specifications, HLB values, and application guidance for every grade from Span 20 to Span 85.
The Span Family at a Glance
Sorbitan esters (Span 20, 60, 80) are the non-ionic W/O workhorses of food emulsification. Our non-ionic surfactant fundamentals covers the full chemical family — Span, Polysorbate, alcohol ethoxylates, and APGs — with E-numbers and HLB data.
Sorbitan Esters are non-ionic, lipophilic (oil-loving) surfactants produced by esterifying sorbitol with fatty acids. The choice of fatty acid determines the HLB value and physical form, which in turn dictate application suitability.
| Product | INCI / Chemical Name | Fatty Acid | HLB | Physical Form | Best For |
|---|---|---|---|---|---|
| Span 20 | Sorbitan Monolaurate | Lauric (C12) | 8.6 | Amber liquid | Co-emulsifier for O/W systems, solubilization |
| Span 40 | Sorbitan Monopalmitate | Palmitic (C16) | 6.7 | Cream paste | Medium-HLB W/O emulsions, pharmaceuticals |
| Span 60 | Sorbitan Monostearate | Stearic (C18) | 4.7 | Tan beads/flakes | Bakery, whipped toppings, structured emulsions |
| Span 65 | Sorbitan Tristearate | Stearic (C18×3) | 2.1 | Tan beads/flakes | Chocolate anti-bloom, yeast protection, lowest HLB |
| Span 80 | Sorbitan Monooleate | Oleic (C18:1) | 4.3 | Amber liquid | General-purpose W/O emulsifier, industrial lubricants |
| Span 85 | Sorbitan Trioleate | Oleic (C18:1×3) | 1.8 | Amber liquid | Extreme W/O systems, defoamers, oil-phase dispersants |
Decision Framework: Which Span for Which Application?
Rule 1: Match HLB to Your Oil Phase
Every oil has a required HLB (rHLB). Select a Span whose HLB is close to this value, or blend Span + Polysorbate to hit the target exactly.
| Oil Phase | Required HLB (W/O) | Recommended Span | Suggested Polysorbate Pair |
|---|---|---|---|
| Soybean oil | 6 | Span 60 (4.7) + Polysorbate 60 | Polysorbate 60 (14.9) |
| Mineral oil (light) | 5 | Span 80 (4.3) + Polysorbate 80 | Polysorbate 80 (15.0) |
| Isopropyl myristate | 5–6 | Span 60 (4.7) | Polysorbate 60 (14.9) |
| Beeswax | 5 | Span 80 (4.3) | Polysorbate 80 (15.0) |
| Coconut oil | 6 | Span 20 (8.6) | Use alone or with low-HLB Span |
| Silicone oil | 5 | Span 85 (1.8) | Polysorbate 85 (11.0) |
Rule 2: Consider Physical Form
- Need a pumpable liquid? Span 80 or Span 20 (liquid at room temp).
- Need a solid structurant? Span 60 or Span 65 (beads/flakes provide body and aeration).
- Formulating a stick or bar? Span 60 gives solid structure; Span 65 adds hardness.
Rule 3: Match Fatty Acid Chain to Your System
Shorter chains (Span 20, C12) offer better foam control. Longer, saturated chains (Span 60/65, C18) deliver better structure and higher melting points. Unsaturated chains (Span 80/85, C18:1) provide flexibility and low-temperature fluidity.
Application-by-Application Selection
Food & Bakery
| Application | Recommended Span | Why |
|---|---|---|
| Bread & buns (dough conditioning) | Span 60 | Strengthens gluten network, improves crumb softness |
| Cakes & whipped toppings | Span 60 | Promotes aeration, stabilizes foam structure |
| Chocolate & confectionery | Span 65 | Prevents fat bloom, modifies crystal structure |
| Yeast (dry instant yeast protection) | Span 65 | Coats and protects yeast cells during drying |
| Margarine & spreads | Span 60 + Span 80 blend | Balances spreadability and structure |
Detailed food-grade specifications → Food Grade Sorbitan Esters Guide (E491-E495)
Cosmetics & Personal Care
| Application | Recommended Span | Why |
|---|---|---|
| Rich W/O night creams | Span 80 | Easy to formulate, excellent skin feel |
| Light O/W lotions | Span 20 or Span 60 (co-emulsifier) | Stabilizes with a primary O/W emulsifier |
| Foundations & lipsticks | Span 60 | Aids pigment wetting and dispersion |
| Sunscreen (W/O) | Span 80 | Water-resistant film formation |
| Hair conditioners | Span 20 | Light emolliency, easy rinse-off |
Formulation techniques → Cosmetic Emulsifiers Guide
Industrial Applications
| Application | Recommended Span | Why |
|---|---|---|
| Metalworking fluids | Span 80 | Emulsification + rust inhibition |
| Agrochemical EC formulations | Span 80 + Polysorbate 80 | Stable emulsifiable concentrates |
| Textile spin finishes | Span 60 | Lubricity at high speed |
| Paint & coatings (pigment dispersion) | Span 20 | Fast wetting of organic pigments |
| Defoamers | Span 85 (ULB) | Ultra-low HLB for oil-phase defoaming |
HLB calculations and solubility data → Industrial Formulation Guide
Product Deep-Dives
Span 80: The General-Purpose Liquid Workhorse
Sorbitan Monooleate is the most commonly specified Span — liquid, versatile, and forgiving. Its unsaturated oleic acid chain keeps it fluid at room temperature. Use it when you need a reliable W/O emulsifier without special handling requirements.
Full profile → Sorbitan Monooleate (Span 80) Guide
Span 60 vs. Span 65: Structure vs. Stability
Both are stearic-acid-based solids, but they serve different purposes:
- Span 60 (Monostearate, HLB 4.7): Better for aeration, hydration, and foam stabilization. The go-to for bakery and whipped products.
- Span 65 (Tristearate, HLB 2.1): Far more hydrophobic. The go-to for crystal modification, chocolate anti-bloom, and yeast coating.
Full comparison → Span 60 vs. Span 65
Span + Polysorbate Synergy: Getting the HLB Right
Rarely is a single Span the complete answer. In practice, you pair a low-HLB Span with a high-HLB Polysorbate (Polysorbate) to precisely target your oil phase’s required HLB.
| Target HLB | Span | Polysorbate | Typical Ratio (Span:Polysorbate) |
|---|---|---|---|
| 5 (W/O emulsion) | Span 80 (4.3) | Polysorbate 80 (15.0) | 9:1 |
| 7 (W/O → O/W transition) | Span 60 (4.7) | Polysorbate 60 (14.9) | 8:2 |
| 10 (O/W emulsion) | Span 60 (4.7) | Polysorbate 60 (14.9) | 5:5 |
| 12 (O/W solubilization) | Span 20 (8.6) | Polysorbate 20 (16.7) | 4:6 |
| 4 (Extreme W/O) | Span 85 (1.8) | Polysorbate 85 (11.0) | 3:7 |
Full synergy guide → Sorbitan Esters vs. Polysorbates
Quick Selection Checklist
Before ordering samples, confirm these five points:
- Oil phase rHLB — Have you calculated or looked up the required HLB?
- Processing temperature — Will the Span be solid or liquid at your mixing temperature?
- Final product form — Liquid, cream, solid stick, or dry powder?
- Regulatory status — Is the E-number (E491–E495) permitted in your target market?
- Synergy — Would a Span + Polysorbate blend outperform a single Span?
Conclusion
The Span series covers an HLB range from 1.8 to 8.6, a physical-form range from free-flowing liquid to hard beads, and an application range from bread to metalworking fluid. The right choice comes down to three variables: oil phase HLB, physical form requirement, and regulatory constraints.
For technical specifications, manufacturing details, and safety protocols, refer to our Technical, Manufacturing & Safety Guide.
Contact FoodEmul.com to request samples, COAs, or personalized formulation support.
Need sorbitan esters? We manufacture Span 60, Span 80, Span 65, and the full sorbitan ester range — Kosher and MUI Halal certified — reach out for specifications or samples.
