MERCK 104351.0100 L-Histidine - for Biochemistry - Laboratuvar Malzemeleri ve Cihazları Tedarikçisi

Ürün Kodu

SD.M.104351.0100

Ürün Markası

Sepete Ekle

MERCK 104351.0100 L-Histidine - for Biochemistry

Description
Catalogue Number	104351
Synonyms	His

Applications
Application	L-Histidine for biochemistry. CAS 71-00-1, pH 7.7 (10 g/l, H₂O, 20 °C).

Physicochemical Information
Density	1.449 g/cm3 (20 °C)
Melting Point	285 °C (decomposition)
pH value	7.0 - 8 (15.5 g/l, H₂O, 25 °C)
Bulk density	430 kg/m3
Solubility	38.2 g/l

Toxicological Information
LD 50 oral	LD50 Rat > 5110 mg/kg

Safety Information according to GHS
RTECS	MS3070000
Storage class	10 - 13 Other liquids and solids
WGK	WGK 1 slightly hazardous to water

Storage and Shipping Information
Storage	Store at +5°C to +30°C.

Specifications
Assay (acidimetric, calculated on dried substance)	99.0 - 101.0 %
Identity (IR-spectrum)	passes test
Appearance	white to almost white, fine-crystalline powder or colorless crystals
Appearance of solution (50 g/l; water)	clear and colorless
Spec. rotation (α 20/D, 110 g/l, hydrochloric acid 120 g/l, calc. on dried substance)	+11.4 to +12.4
Chloride (Cl)	≤ 200 ppm
Sulfate (SO₄)	≤ 200 ppm
Heavy metals (as Pb)	≤ 10 ppm
As (Arsenic)	≤ 5.0 ppm
Ca (Calcium)	≤ 10 ppm
Co (Cobalt)	≤ 5 ppm
Fe (Iron)	≤ 5 ppm
K (Potassium)	≤ 100 ppm
Mg (Magnesium)	≤ 5 ppm
Na (Sodium)	≤ 100 ppm
Zn (Zinc)	≤ 5 ppm
Ninhydrin-positive substances (LC) (any ninhydrin-positive impurity)	≤ 0.2 %
Ninhydrin-positive substances (LC) (ammonium (570 nm))	≤ 0.02 %
Ninhydrin-positive substances (LC) (total impurities)	≤ 0.5 %
Loss on drying (105 °C; 3 h)	≤ 0.2 %