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71687

Sigma-Aldrich

Sodium hydroxide

BioUltra, for luminescence, ≥98.0% (T), pellets

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Synonym(s):
Caustic Lye, Caustic Soda, Soda Lye, Sodium Hydrate, ‘Caustic soda’
Linear Formula:
NaOH
CAS Number:
1310-73-2
Molecular Weight:
40.00
EC Number:
215-185-5
MDL number:
MFCD00003548
UNSPSC Code:
12352316
PubChem Substance ID:
57652336
NACRES:
NA.32

grade

for luminescence

Quality Level

100

vapor density

>1 (vs air)

vapor pressure

<18 mmHg ( 20 °C)
3 mmHg ( 37 °C)

product line

BioUltra

Assay

≥98.0% (T)

form

pellets

technique(s)

cell culture | mammalian: suitable

impurities

insoluble matter, passes filter test
≤0.0003% total nitrogen (N)
≤0.0005% silicon dioxide (SiO2)
≤1.0% sodium carbonate (Na2CO3)

mp

318 °C (lit.)

solubility

H2O: 1 M at 20 °C, clear, colorless

density

2.13 g/cm3

anion traces

chloride (Cl-): ≤70 mg/kg
phosphate (PO43-): ≤5 mg/kg
sulfate (SO42-): ≤50 mg/kg

cation traces

Ag: ≤5 mg/kg
Al: ≤5 mg/kg
As: ≤0.1 mg/kg
Ba: ≤5 mg/kg
Bi: ≤5 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
Hg: ≤0.1 mg/kg
K: ≤500 mg/kg
Li: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Mo: ≤5 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Zn: ≤5 mg/kg

SMILES string

[OH-].[Na+]

λ

1 M in H2O

UV absorption

λ: 260 nm Amax: 0.015
λ: 280 nm Amax: 0.01

suitability

in accordance for luminescence

InChI

1S/Na.H2O/h;1H2/q+1;/p-1

InChI key

HEMHJVSKTPXQMS-UHFFFAOYSA-M

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General description

Sodium Hydroxide, also known as caustic soda or lye, is a white crystalline odorless solid which is corrosive and absorbs moisture from the air. When dissolved in water, Sodium Hydroxide generates heat to ignite combustible materials. In the form of pellets, Sodium Hydroxide, when dissolved, forms a colorless liquid, denser than water.

Application

Sodium Hydroxide is generally used in the solid or 50% solution form. It is suitable for use at various stages of soaps, paper, rayon, and petroleum product manufacturing. It is also used in carbohydrate research using FTIR analysis. Sodium Hydroxide is used as a pre-treatment reagent to study enzymatic hydrolysis.

Pictograms

Corrosion
GHS05

Signal Word

Danger

Hazard Statements

H290,H314

Hazard Classifications

Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1A

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

危险化学品

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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