小田温泉(草太郎庵)
Oda Onsen (Soutarouan)Operated by · 草太郎庵
曹
Bicarbonate
+ Chloride · Sulfate
- Color
- very faintly yellow and clear
- Taste
- salty
- Odor
- hydrogen sulfide with a metallic iron note
Sodium Bicarbonate-Chloride-Sulfate spring
Hot source · 66°CHigh silica
Composition fingerprint2.1 g/kg dissolved · Hypotonic
Na⁺63
Mg²⁺14
HCO₃⁻47
Cl⁻31
SO₄²⁻22
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Bicarbonate HCO₃⁻
- "soda" — softens skin, leaves it smooth.
Known good for
- Smooth skindry, rough skin
- Circulationtired legs
- Aches & jointsstiff shoulders
A sodium-led blend of bicarbonate, chloride and sulfate water rising at 66.1 °C — among the hotter sources in the country, cooled before bathing. The water carries a faint yellow tint at the source, a salty tang and an unmistakable rotten-egg note of hydrogen sulfide layered with a metallic iron edge. Weakly alkaline and gentle on the skin, with a generous 313 mg/kg of metasilicic acid that leaves a thin silica film for noticeably smoother skin.
Sampled at wellhead·Analyzed Jul 14, 2006·株式会社 同仁グローカル·Cert no. 第S0602446号