みどり荘温泉
Midorisou Onsen酸
Acidic
+ 単純硫黄泉
- Color
- colorless and clear
- Taste
- strongly metallic
- Odor
- strong hydrogen sulfide
Hydrogen Sulfate spring
pH 2.7AcidicHot source · 44°CUltra-acidicSulfur-richHigh silica
Composition fingerprint0.4 g/kg dissolved · Hypotonic
H⁺49
Al³⁺14
Na⁺13
SO₄²⁻95
◀ CationsAnions ▶
- Hydrogen H⁺
- makes the water acidic — sharp and bactericidal.
- Sulfate SO₄²⁻
- "gypsum / Glauber's salt" — vessels and wound healing.
Known good for
- Skin conditionsatopic skin, eczema
- Circulationtired legs
- Aches & jointsstiff shoulders
- Sensitive-skin cautionbroken or dry skin
A self-flowing source in Beppu's Myoban district, classified as a strongly acidic simple sulfur spring (hydrogen-sulfide type) at pH 2.7. At the wellhead the water is colorless and clear yet carries a sharp metallic edge and a strong rotten-egg note of H₂S. It is also rich in metasilicic acid (145 mg/kg), the kind of silica that leaves a thin film for noticeably smoother skin.
Sampled at wellhead·Analyzed Oct 14, 2009·社団法人 大分県薬剤師会·Cert no. 大薬検第7R-21100009号