Hóa chất Phenol red Merck 1072410100 (C₁₉H₁₄O₅S, chai thủy tinh 100g) DEEP52 https://yeuhangduc.vn/
Mô tả
CAS #: 143-74-8
EC number: 205-609-7
Hill Formula: C₁₉H₁₄O₅S
Molar Mass: 354.38 g/mol
Identity (UV/VIS-Spectrum): passes test
Clarity of solution (1 g/l; ethanol): passes test
1st transition range: pH 1.2 - pH 3.0 brownish orange - yellow
2nd transition range: pH 6.5 - pH 8.0 brownish yellow - red violet
Absorption maximum λ 1 max. (buffer pH 1,2): 503 - 506 nm
Absorption maximum λ 2 max. (buffer pH 3,0): 430 - 435 nm
Absorption maximum λ 3 max. (buffer pH 6.5): 430 - 435 nm
Absorption maximum λ 4 max. (buffer pH 8,0): 557 - 560 nm
Spec. Absorptivity A 1%/1cm (λ 1 max.; 0.005 g/l; buffer pH 1,2; calc. on dried substances): 900 - 1150
Spec. Absorptivity A 1%/1cm (λ 2 max.; 0.005 g/l; buffer pH 3,0; calc. on dried substances): 550 - 650
Spec. Absorptivity A 1%/1cm (λ 3 max.; 0.005 g/l; buffer pH 6.5; calc. on dried substances): 550 - 650
Spec. Absorptivity A 1%/1cm (λ 4 max.; 0.005 g/l; buffer pH 8,0; calc. on dried substances): 1000 - 1250
Loss on drying (110 °C): ≤ 1
Transition range (according to ACS): pH 5,8 - pH 8,2 yellow - red
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