ISO 3757-2002 PDF

Full title and description

ISO 3757:2002 — Oil of patchouli (Pogostemon cablin (Blanco) Benth.). This International Standard specifies characteristics and assessment criteria for essential oil obtained from the dried leaves of Pogostemon cablin (patchouli) to facilitate evaluation of its quality for trade, formulation and laboratory testing.

Abstract

ISO 3757:2002 defines physical, chemical and chromatographic characteristics used to assess the identity and quality of patchouli oil. It gives requirements and recommended test methods for appearance, colour, odour, relative density, refractive index, optical rotation, miscibility in ethanol, acid and ester values, and a gas‑chromatographic profile that identifies principal components (for example patchoulol/patchouli alcohol and other marker sesquiterpenes). The standard is intended to support consistency in quality control, trade, laboratory analysis and safety handling of patchouli essential oil.

General information

• Status: Published (International Standard, confirmed).
• Publication date: November 2002.
• Publisher: International Organization for Standardization (ISO), prepared by ISO/TC 54 — Essential oils.
• ICS / categories: 71.100.60 — Essential oils.
• Edition / version: 2nd edition (ISO 3757:2002).
• Number of pages: 6 pages.

Scope

This standard applies to oil of patchouli obtained by steam distillation (steam entrainment) of the dried leaves of Pogostemon cablin (Blanco) Benth. It specifies the characteristics to be checked and the parameters to be reported so that the oil’s quality and authenticity can be evaluated consistently. Normative references to ISO methods for determination of density, refractive index, optical rotation, miscibility in ethanol, acid and ester values and chromatographic profiling are included.

Key topics and requirements

• Definition and source: oil of patchouli from Pogostemon cablin (Blanco) Benth.
• Appearance and colour: liquid of variable viscosity, yellow to reddish‑brown (descriptive requirements).
• Odour: characteristic leafy, woody, humic and persistent patchouli odour.
• Physical constants: typical ranges for relative density (at 20 °C), refractive index (at 20 °C) and optical rotation (at 20 °C) are specified for quality assessment.
• Chemical parameters: maximum limits or guidance for acid value and ester value to indicate freshness/purity.
• Miscibility: solubility/miscibility in defined ethanol concentrations is specified as part of identity testing.
• Chromatographic profile: a GC profile is required to identify and quantify characteristic constituents (e.g., patchoulol/patchouli alcohol and principal sesquiterpenes) as markers of authenticity and chemotype.
• Sampling and test methods: references to ISO sampling and test-method standards for essential oils are provided to ensure reproducible laboratory results.

Typical use and users

Used by essential‑oil producers and distillers, fragrance and flavour houses, cosmetic formulators, analytical laboratories, traders and regulatory bodies for product specification, incoming quality control, authentication, batch release and dispute resolution in commercial transactions involving patchouli oil.

Related standards

References and cross‑references commonly cited in conjunction with ISO 3757 include general and method standards for essential oils such as ISO 11024 (preparation and use of chromatographic profiles), ISO sampling and packaging guidance for essential oils, and ISO methods for density, refractive index, optical rotation, miscibility, acid/ester values and gas‑chromatography procedures used to generate chromatographic profiles.

Keywords

patchouli oil; Pogostemon cablin; essential oil; patchoulol; patchouli alcohol; chromatographic profile; refractive index; relative density; optical rotation; acid value; ester value; quality control.

FAQ

Q: What is this standard?

A: ISO 3757:2002 is an International Standard that specifies characteristics and test‑method references for oil of patchouli (Pogostemon cablin) to assess its quality and authenticity.

Q: What does it cover?

A: It covers descriptive, physical and chemical characteristics (appearance, colour, odour, density, refractive index, optical rotation, miscibility, acid/ester values) and requires a gas‑chromatographic profile identifying principal constituents used to confirm identity and quality.

Q: Who typically uses it?

A: Producers, traders, cosmetic and fragrance manufacturers, analytical laboratories and regulators involved in quality control, specification and trade of patchouli essential oil.

Q: Is it current or superseded?

A: ISO 3757:2002 is published as the 2nd edition (2002). Users should check the ISO catalogue or their national standards body for any subsequent amendments, confirmations or revisions beyond the 2002 edition before relying on it for the latest regulatory or commercial requirements.

Q: Is it part of a series?

A: It sits within ISO’s body of standards on essential oils and is intended to be used alongside general ISO guidance and method standards for essential oils (for example ISO 11024 series and other ISO methods for physical and chemical determinations).

Q: What are the key keywords?

A: Patchouli oil, Pogostemon cablin, essential oil, chromatographic profile, patchoulol (patchouli alcohol), density, refractive index, optical rotation, acid value, ester value, quality control.