Silica gel, pptd., cryst.-free (CAS 112926-00-8) — Citrus N/A Note Fragrance Ingredient

ByThe Good Scents
Citrus · Floral

Silica gel, pptd., cryst.-free

CAS 112926-00-8

Origin
synthetic
Note
N/A
IFRA
Generally safe
Data as of: Apr 2026

What Is Silica gel, pptd., cryst.-free?

Silica gel is a synthetic desiccant commonly found in small packets labeled ‘Do Not Eat’ packaged with electronics, shoes, and food products. It absorbs moisture to prevent damage from humidity. While non-toxic, the packets pose a choking hazard and should be kept away from children and pets.

Safety Profile

GENERALLY SAFE
Generally safeUse with awarenessProfessional use
✓ Non-toxic when handled properly
⚠ Choking hazard – keep packets away from children
CAS
112926-00-8
Formula
Mixture
MW
Variable
Odor Family
Citrus · Floral
Layer 1 · Enthusiast

What Does Silica gel, pptd., cryst.-free Smell Like?

Silica gel is odorless in its pure form. Some commercial packets may have a faint chemical smell from manufacturing residues, but the material itself has no detectable scent. It does not contribute olfactory notes to fragrances.

Layer 2

Chemistry, Properties & Perfumer Guide

The Chemistry

Silica gel is an amorphous form of silicon dioxide (SiO₂) synthesized from sodium silicate. Unlike crystalline silica, the gel form has a highly porous structure with a massive surface area (800 m²/g) that enables exceptional moisture absorption. Industrial production involves acidification of silicate solutions followed by washing and drying to create the characteristic porous beads or granules.

Physical & Chemical Properties

AppearanceTranslucent beads or granules
Surface Area800 m²/g
Pore Size2-3 nm

Perfumer Guide

Note Position
N/A
Volatility
N/A
Blending
N/A
ApplicationTypical %RangeNotes
Desiccant100%N/AMoisture control in packaging

Classic Accords

Tip: Not used as a fragrance ingredient – exclusively for moisture control in packaging.

Alternatives & Comparisons

1
Molecular sieves CAS N/A

Zeolite-based desiccants with uniform pore sizes for selective moisture absorption in specialized applications.

Layer 3

Safety, Regulatory & Sustainability

⚠ Regulatory Disclaimer

General reference only. Consult current IFRA Standards Library before formulating.

IFRA Status

Not regulated by IFRA – not a fragrance material.

RIFM Assessment

Not assessed by RIFM – not a fragrance material.

Sustainability

Silica gel is energy-intensive to produce but can be regenerated by heating to remove absorbed moisture. Some manufacturers offer recycled silica gel products. The material itself is inert and poses minimal environmental risk when disposed of properly.

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References

  1. PubChem. Silica gel. U.S. National Library of Medicine. PubChem

Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.

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Ingredient Data Sheet

CAS 112926-00-8

Physical Properties

Molecular Weight60.084 g/mol🔬 PubChem
Vapor Pressure0 mmHg @ 25°C📊 OPERA
Data Sources & Attribution
Physical data: PubChem (NIH/NLM), U.S. EPA CompTox Dashboard, EPA OPERA models, RDKit. Odor & flavor: Arctander (Perfume & Flavor Chemicals), Fenaroli's Handbook of Flavor Ingredients, Leffingwell. Thresholds: van Gemert (Compilations of Odour Threshold Values). Regulatory: IFRA Standards 51st, FEMA GRAS. Trade names: Surburg (Common Fragrance & Flavor Materials). All data compiled and cross-referenced for perfumertools.com.

Physicochemical Properties

DTXSID: DTXSID9029851

Physical Properties

Molecular Weight 60.084 g/mol🔬 PubChem
Density 2.2 g/cm^3🔬 PubChem

Transport Properties

Vapor Pressure 0 mmHg🔬 PubChem

Data Sources:

🔬 EPA Experimental data from U.S. EPA CompTox Chemicals Dashboard & CTX APIs. 📊 OPERA Predicted using EPA's OPERA QSAR models. 💻 Computed Calculated from SMILES using RDKit.

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