德国默克Merck柠檬酸1.00244.0500测试试剂

产品名称

柠檬酸 一水合物, for analysis EMSURE^® ACS,ISO,Reag. Ph Eur

InChI

1S/C6H8O7.H2O/c7-3(8)1-6(13,5(11)12)2-4(9)10;/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12);1H2

SMILES string

OC(CC(O)(C(O)=O)CC(O)=O)=O.O

InChI key

YASYEJJMZJALEJ-UHFFFAOYSA-N

grade

ACS reagent

agency

reag. ISO
reag. Ph. Eur.

vapor pressure

<1 Pa ( 25 °C)

product line

EMSURE^®

assay

99.5-100.5% anhydrous basis (acidimetric)

form

solid

potency

3000 mg/kg LD₅₀, oral (Rat)

composition

Water, 7.5-8.8% Karl Fischer

impurities

≤200 ppm Sulfated ash
≤50 ppm In water insoluble matter

color

clear
white to almost white

pH

1.85 (25 °C, 50 g/L in H₂O)

pKa 

(1) 3.13, (2) 4.76, (3) 6.4

mp

135-152 °C

transition temp

flash point 173.9 °C

solubility

880 g/L

density

1.54 g/cm³ at 20 °C

bulk density

800‑1000 kg/m³

anion traces

chloride (Cl^-): ≤5 ppm
oxalate (as oxalic acid): ≤50 ppm
phosphate (PO₄^3-): ≤10 ppm
sulfate (SO₄^2-): ≤20 ppm

cation traces

Al: ≤0.2 ppm
As: ≤1 ppm
Cu: ≤5 ppm
Fe: ≤3 ppm
Hg: ≤1 ppm
Pb: ≤0.5 ppm
heavy metals (as Pb): ≤5 ppm

storage temp.

2-30°C

Quality Level

300