Overview
ISO 3757:2002 is an international standard published by the International Organization for Standardization (ISO) that defines the quality characteristics of oil of patchouli, derived from Pogostemon cablin (Blanco) Benth., a plant of the Lamiaceae family. This essential oil is widely used in perfumery, cosmetics, and aromatherapy due to its distinctive aromatic profile and therapeutic properties. The standard establishes consistent criteria for assessing the quality, purity, and composition of patchouli oil, helping producers, suppliers, and buyers ensure product authenticity and reliability across the global market.
Key Topics
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Scope and Definition
ISO 3757 specifies the properties required to evaluate patchouli oil quality, focusing on physical characteristics like appearance, color, and odor. It also sets parameters for chemical attributes and chromatographic profiles for detailed analysis.
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Physical Properties
- Appearance: Liquid with variable viscosity
- Color: Yellow to reddish brown
- Odor: Leafy, humic, clinging
- Relative density at 20 °C: 0.952 to 0.975
- Refractive index at 20 °C: 1.5050 to 1.5150
- Optical rotation at 20 °C: −60° to −40°
- Miscibility: Must be soluble in 90% ethanol under defined conditions
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Chemical Properties
- Acid value: Maximum 4
- Ester value: Maximum 10
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Chromatographic Profile
Gas chromatography analysis is mandatory to identify key components such as β-patchoulene, α-guaiene, β-caryophyllene, bulnesene, patchoulol, and pogostol, among others. The standard specifies quantitative ranges for these constituents, ensuring the chemical fingerprint of authentic patchouli oil.
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Sampling and Testing
Minimum test sample volume is 25 ml to ensure all tests can be accurately conducted, with test methods referenced from related ISO standards addressing density, refractive index, optical rotation, miscibility, acid and ester values, and chromatographic profiling.
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Packaging and Labeling
Packaging, conditioning, and labeling requirements follow related ISO guidelines, enhancing traceability and safe handling.
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Flashpoint
An informative annex provides a typical flashpoint value of +116 °C, relevant for transportation and safety regulation compliance.
Applications
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Quality Control and Assurance
ISO 3757 facilitates the consistent evaluation of patchouli oil batches, critical for producers and manufacturers in perfumery, cosmetics, and aromatherapy industries to maintain high-quality standards.
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Trade and Regulatory Compliance
Traders and regulatory bodies use the standard as a reference to verify the authenticity and purity of patchouli oil, preventing adulteration and assuring compliance with international trade regulations.
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Research and Development
Laboratories conducting chemical analysis can apply the chromatographic profile data specified to characterize samples and develop new products or formulations based on patchouli oil.
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Safety Management
Information on physical and chemical properties assists in safe handling, storage, and transportation, reducing risks associated with flammable essential oils.
Related Standards
- ISO 11024-1 & ISO 11024-2 – Guidance on preparation and utilization of chromatographic profiles for essential oils
- ISO/TR 210, 211, 212 – General rules for packaging, labeling, and sampling of essential oils
- ISO 279, 280, 592, 709, 875, 1242 – Standardized test methods for determination of essential oil physical and chemical parameters such as density, refractive index, optical rotation, ester value, and acid value
- ISO/TR 11018 – Methods for determining flashpoint of essential oils
- ISO/TR 21092 – Essential oils characterization through CAS number and other identifiers
Adherence to ISO 3757:2002 strengthens trust in patchouli oil quality worldwide, supporting fair trade and consistent product performance for industrial users and consumers alike. This standard is an essential reference for anyone involved in the production, analysis, sale, or usage of patchouli essential oil.