- Destructive distillation pyrolysate của bark + wood từ Betula spp. — KHÔNG phải steam-distilled EO thông thường. Class giống Cade oil (Juniperus oxycedrus dry-distilled): pyrolysis → PAH risk.
- IFRA: CRUDE (unrectified) birch tar PROHIBITED as fragrance ingredient. Chỉ rectified (purified) birch tar được phép, và final product ≤ 1 ppb PAHs (benzo[a]pyrene, 1,2-benzanthracene).
- Hazards: Toxicity; unrectified oils may be carcinogenic (PAHs). Contraindications: Oral prohibited; unrectified use prohibited.
- Chemistry dominated by phenolic/guaiacol/cresol class (NO terpenes): Cresol + Guaiacol major + creosol + pyrocatechol + xylenol traces (Guenther 1949–1952).
- Cresols prohibited as cosmetic ingredients in Canada. Not irritating/sensitizing at 2% on 25 volunteers (Opdyke 1973) — non-phototoxic but phototoxicity is moot given the oil is regulated primarily for PAH carcinogenicity.
Tổng Quan
- Danh pháp khoa học
- Betula lenta L.; Betula pendula Roth.; Betula pubescens Ehrh.
- Họ thực vật
- Betulaceae
- Bộ phận dùng
- Bark and wood
- Phương pháp chiết xuất
- destructive_distillation
- Màu sắc
- —
- Phân loại nốt hương
- Nốt Base
- Hương thơm
- —
- Chemotype / Cultivar
- —
Tình trạng tại Việt Nam
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Phân loại nốt
Base
Cường độ
5/5
Độ bền trên da
2–4 giờ
Họ hương
Smoky-leathery-phenolic-tar (signature "burnt wood" / "Russian leather" / "campfire")
Hương đầu (Opening)(0–15 phút)
Acrid medicinal smoke, dark tarry phenol, smoldering leather char, cold campfire ash, raw and ancient
Hương giữa (Heart)(15–60 phút)
Khói hắc xông nồng, nhựa bạch dương sẫm đặc, da thuộc cháy than, tro âm ỉ lạnh, hoang dã nguyên thủy
Hương nền (Drydown)(1–4 giờ)
2–4 giờ
Cường độ hương
5/5
Da khô
2/5
Da dầu/mụn
3/5
Da lão hóa
2/5
Da thường
1/5
Da nhạy cảm
1/5
Da hỗn hợp
2/5
Nhập khẩuImported
Tên gọi tại Việt Nam
Tinh dầu hắc ín bạch dương (Birch tar / pyrolysate)
Pha Chế & Hòa Hợp
keratolytic / anti-psoriatic
Phenolic fraction of rectified birch tar (cresols, guaiacol) is believed to slow epidermal cell proliferation in hyperkeratotic conditions, a mechanism shared across coal-tar and birch-tar pyrolysate preparations historically.
Ref: Tisserand & Young 2014, Ch.13, p.476–477; Guenther 1949–1952, vol.6, p.17
antipruritic
Phenolic constituents in the tar fraction are thought to suppress pruritic signalling in inflamed skin; the antipruritic action is inseparable from the broader anti-psoriatic and antiseptic properties of the phenol class.
Ref: Tisserand & Young 2014, Ch.13, p.476–477; Opdyke 1973, p.1037
antiseptic / antimicrobial
Phenolic constituents (p-cresol, guaiacol, catechol) are broad-spectrum biocides with a long history of wound-care and skin-infection use; mechanism is membrane disruption and enzyme denaturation common to the phenol class.
Ref: Tisserand & Young 2014, Ch.13, p.476–477; Opdyke 1973, p.1037
anti-seborrhoeic
Historical use for seborrheic dermatitis of the scalp; phenolic tar fraction is thought to normalise epidermal turnover and reduce Malassezia colonisation by analogy with rectified cade of the same pyrolysate class.
Ref: class-extrapolation from cade (pyrolysate class)
antiparasitic (ectoparasites)
Traditional ethnobotanical use in veterinary and human ectoparasite control (scabies, lice); phenolic content is lethal to ectoparasites at concentrations well below mammalian dermal safety thresholds.
Ref: Tisserand & Young 2014, Ch.13, p.476–477
AI-summary
No RCT-grade clinical evidence is traceable to the §13 source set for birch tar as an isolated aromatherapy preparation. The therapeutic reputation rests on centuries of pyrolysate tar use in European dermatology — birch tar and coal tar share the same phenolic-class mechanism for psoriasis and eczema management, catalogued in Guenther (1949–1952) and Opdyke (1973). The p-cresol cited evidence (Thompson et al. 1994/1996; Lesaffer et al. 2001; NTP 2000) is entirely toxicity-oriented (glutathione depletion, systemic LD₅₀) and does not support efficacy claims. IFRA (2009) mandates rectification to remove PAHs — a safety standard, not a clinical efficacy threshold. Traditional aromatherapy use supported by historical phytochemical monographs; no RCT-grade clinical evidence located.
NarrativeTâm trạng: Grounding
primalprotectionsolituderesilienceancestralintrospection
Chakra
root
Ngũ hành
kim
| Phương pháp | Liều lượng | Ghi chú |
|---|---|---|
| Topical spot application | 0.1% in carrier oil (1 drop per 50 ml carrier) | Apply only to discrete affected areas (psoriasis plaques, eczema). Never apply to broken skin. Rectified birch tar only. Contraindicated in pregnancy and children. Patch test mandatory. |
| Scalp treatment (rinse-off only) | 0.1% in neutral carrier; leave on ≤10 min, rinse thoroughly | For seborrheic dermatitis or scalp psoriasis. Rinse-off only to limit p-cresol systemic absorption. Avoid eyes and facial skin. Rectified oil meeting IFRA 2009 PAH limits only. |
| Diffusion | 1–2 drops in large-room diffuser; ≤20 min session | Intensely smoky, phenolic aroma — minimal therapeutic claim at inhalation doses. Ventilate well. Not for children, pregnancy, or anyone with respiratory conditions. |
| Cold compress | 0.1% dilution in carrier applied to compress cloth; 5–10 min | Apply to one discrete affected patch only. Do not use over large body-surface-area; systemic p-cresol absorption cannot be controlled at scale. Rectified oil only. |
Dầu nền phù hợp
Evening primrose oilRich in GLA (γ-linolenic acid), supports skin barrier with anti-inflammatory activity in eczema — synergistic with birch tar's phenolic antipruritic action on inflammatory dermatoses.
Hemp seed oilBalanced omega-6/omega-3 profile is anti-inflammatory and non-comedogenic; well-suited to the psoriatic and eczematous skin conditions birch tar is traditionally used for.
Jojoba waxLiquid wax structurally similar to sebum; stable, non-comedogenic, and well-suited to scalp applications targeting seborrheic dermatitis.
Kết hợp tốt với
ResinousWoodySpicyEarthy
Blend kinh điển
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—
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[Tisserand & Young] Ch.13 p.476–477 (Birch tar)
[Guenther, E.] 1952) The Essential Oils vol 6 p.17 [via B216]
[Opdyke, D. L. J.] Birch tar oil p.1037 [via B216]
[IFRA] Birch tar rectification + PAH limit [via B216]
An Toàn
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Giới hạn IFRA
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Thai kỳ & Cho con bú
Tam cá nguyệt 1Unknown
Tam cá nguyệt 2Unknown
Tam cá nguyệt 3Unknown
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