谷の湯
Taninoyu Spring塩
Chloride
- Color
- colorless and clear
- Taste
- sour
- Odor
- odorless
Sodium Chloride spring
pH 4.9Weakly acidicHot source · 71°CHigh silica
Composition fingerprint3.3 g/kg dissolved · Hypotonic
Na⁺87
Cl⁻82
SO₄²⁻17
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Chloride Cl⁻
- table-salt anion — coats the skin and holds heat in.
Known good for
- Warmingcold sensitivity
- Aches & jointsstiff shoulders
- Smooth skindry, rough skin
A sodium chloride spring drawn from one of Japan's hottest natural sources — the water leaves the ground above 71 °C. It runs weakly acidic, with a faint sour note if tasted, and its 3,306 mg/kg of dissolved solids give it the heat-retaining quality chloride waters are known for: the warmth lingers well after you climb out. What stands out chemically is metasilicic acid at 357.6 mg/kg, an unusually generous figure that leaves a thin silica film on the skin and places this water squarely in Japan's beauty-water family.
Analyzed Sep 24, 2010·大分県衛生環境研究センター·Cert no. 衛環研第105号の6