奥白馬温泉
Okuhakuba OnsenOperated by · 奥白馬高原開発株式会社
Sampled at wellhead
曹
Bicarbonate
Classification
Sodium Bicarbonate spring
A sodium-led bicarbonate spring — the classic 'jūsō-sen' style, soft and rounded on the skin. Hypotonic, neutral pH, sitting in the Japanese 'beauty-water' family. Metasilicic acid runs to 108.6 mg/kg, leaving a thin silica film that makes skin feel smoother afterwards. Free CO₂ at 284 mg/kg arrives as an aromatic gas, paired with a faint mineral tang and the merest whisper of H₂S at the wellhead.
pH
6.60
Neutral
Source temperature
38.6°C
Warm
Tonicity
1.12g/kg
Hypotonic
Free CO₂
284mg/kg
Typical
Free H₂S
0.04mg/kg
Low
- Color
- nearly colorless
- Taste
- slightly mineral
- Odor
- essentially odorless with a very faint hydrogen sulfide note; an odorant gas (rich in CO₂) is also released
Highlights
- High silica
Analyzed Apr 2, 2020·一般社団法人 長野県薬剤師会
