1. Core Comparison Table

 

Comparison Item Golden Osmanthus Concrete Silver Osmanthus Concrete Orange Osmanthus Concrete Four-Season Osmanthus Concrete
Concrete yield (fresh flower basis) 0.33%~0.42% 0.40%~0.46% (highest) 0.28%~0.35% 0.22%~0.30% (lowest)
Corresponding absolute oil yield 0.15%~0.18% 0.17%~0.19% 0.13%~0.16% 0.10%~0.14%
Paste color Uniform brown Dark brown, near black Reddish-brown with heavy pigment Pale earth brown, grayish thin texture
Texture Moderate viscosity, medium wax content Rich wax, solidifies easily when cooled High colloid & polyphenol, sticky thin paste Low solid content, delaminates at low temperature
Absolute oil color Pale golden & transparent Deep golden Dark orange-red Turbid pale yellow with impurities
Dominant aroma profile Sweet peach fruity top note, bright floral Intense violet body note, long-lasting retention Woody green note, faint berry spicy hint, weak floral Thin flat sweet, green grass off-odor, faint authentic osmanthus scent

 

2. Key Aroma Components (GC-MS Relative Content)

Golden Osmanthus

  • Highest content of linalool and γ-decalactone (peach fruity character), bright fresh top notes.
  • Medium β-ionone, balanced sweet fruity-floral aroma with minimal off-odors.
  • Merit: Widely accepted pure natural fragrance for food flavoring.
  • Defect: Weaker base note, shorter lasting scent than silver osmanthus.

Silver Osmanthus

  • Dominated by high β-ionone (35%~40%), the core long-lasting fixative component of osmanthus.
  • Rich long-chain fatty acids and plant wax dissolved out during petroleum ether extraction.
  • Low γ-decalactone, lacks fresh peach sweetness.
  • Merit: Maximum extraction yield, excellent fixative performance after dewaxing.
  • Defect: Insufficient fruity sweetness, not suitable for candy & beverage flavors.

Orange Osmanthus

  • Low linalool and β-ionone; abundant pinene & hexenyl esters bringing strong green woody odor.
  • High polyphenols and carotenoid pigments darkening both concrete and absolute oil.
  • Almost no lactone fruity sweetness; unique cold woody tone with weak authentic osmanthus character.
  • Defect: Deep color restricts its application in light-colored perfume & body care formulas.

Four-Season Osmanthus

  • β-ionone content only 1/10 of silver osmanthus; severe lack of linalool & linalool oxides.
  • Insufficient glycoside aroma precursors due to repeated blooming all year round.
  • High damp green off-odors, low total aromatic compounds.
  • Limitation: Cannot be used as single main fragrance base, only for blending filler.

 

3. Sensory Olfactory Distinction

  1. Golden Osmanthus Bright peach & apricot sweet top note releases immediately after opening; mild honey osmanthus floral heart note, subtle woody base. Balanced transparent aroma closest to fresh picked osmanthus blossoms.
  2. Silver Osmanthus Soft top note; thick violet floral aroma develops after standing with excellent longevity. Obvious waxy texture, restrained heavy sweetness, ideal for perfume base fixative.
  3. Orange Osmanthus Weak floral scent; green pine grass note first perceived, accompanied by faint berry spiciness with very mild sweetness, cold woody biased character.
  4. Four-Season Osmanthus Thin, flat and damp odor with strong raw grass off-note; vague osmanthus character, volatile and fades rapidly within minutes.

4. Processing Difference (Concrete to Absolute Oil via Dewaxing)

  • Silver osmanthus: Maximum wax precipitation during ethanol low-temperature dewaxing; slight oil loss but superior lasting aroma after refining.
  • Golden osmanthus: Moderate wax content, easy dewaxing, transparent absolute oil with minimum yield loss, optimal for mass production.
  • Orange osmanthus: High colloid and pigment; absolute oil remains orange-red after dewaxing, incompatible with light-toned products.
  • Four-Season osmanthus: Light wax causes turbidity & stratification under low temperature; low clarity with excessive impurities in finished absolute oil.

5. End-use Application Positioning

  1. Golden Osmanthus ConcreteFood flavors (osmanthus drinks, pastries, candy, liquor), mid-range body care, general aromatherapy; largest circulation volume in the market.
  2. Silver Osmanthus ConcreteMass exported concrete, premium aromatherapy, perfume fixative base, long-lasting laundry & body care fragrances.
  3. Orange Osmanthus ConcreteWoody masculine perfume, dark-toned skin care essential oil, compound blending spices; forbidden for food applications.
  4. Four-Season Osmanthus ConcreteLow-cost air fresheners, cheap laundry detergent, industrial blending filler; never used in food or high-end fragrance products.

6. Quick Selection Guide for Petroleum Ether Extraction

  • Edible osmanthus absolute oil & mass-market aromatherapy → Golden Osmanthus
  • High extraction yield, export-grade concrete & long-lasting fixative → Silver Osmanthus
  • Unique cold woody fragrance, dark-toned essential oil blending → Orange Osmanthus
  • Low-cost industrial filler & low-end daily chemicals → Four-Season Osmanthus (not recommended for premium production)
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