中之郷温泉2号井
Nakanogo Onsen Well No. 2Operated by · 八丈町長 山下
塩
Chloride
- Color
- colorless and clear, slightly salty, slightly ferrous, odorless
- Taste
- slightly salty, slightly ferrous
- Odor
- odorless
Sodium Chloride spring
pH 6.0NeutralHot source · 46°CHigh silica
Composition fingerprint9.9 g/kg dissolved · Isotonic
Na⁺74
Mg²⁺15
Cl⁻90
◀ 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 hot spring at 45.7 °C, isotonic and near-neutral (pH 6.0 at the wellhead). Moderately mineralized at 9.87 g/kg, with noticeable body — salty, heat-retaining chloride water. Metasilicic acid is generous at 152 mg/kg, leaving the kind of thin silica film that makes skin feel smoother afterwards, in the Japanese "beauty-water" family. The lab sample develops a faint iron note on standing, hinting at the trace iron the cert reports.
Sampled at wellhead·Analyzed Jun 27, 2023·公益財団法人 中央温泉研究所·Cert no. 第3826号
