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Key Documents

688363

Sigma-Aldrich

Molecular sieves, 4 Å

powder, activated, −325 mesh particle size

Synonym(s):

SYLOSIV® A4, Sodium Alumino-Silicate

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500 G
CN¥900.34
2.5 KG
CN¥1,924.12

CN¥900.34

Estimated to ship onApril 22, 2025Details

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500 G
CN¥900.34
2.5 KG
CN¥1,924.12

About This Item

Linear Formula:
Na12[(AlO2)12(SiO2)12] · xH2O
CAS Number:
70955-01-0
MDL number:
MFCD00147627
UNSPSC Code:
23201100
eCl@ss:
32110204
NACRES:
NA.21

CN¥900.34

Estimated to ship onApril 22, 2025Details

Request a Bulk Order

form

powder

particle size

−325 mesh

pore size

4 Å

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Show Differences

1 of 4

This Item
902179102379102392
Calcium chloride anhydrous granules Reag. Ph Eur

102378

Calcium chloride

Calcium chloride anhydrous, granular, ≤7.0 mm, free-flowing, Redi-Dri™, ReagentPlus®, ≥93%

902179

Calcium chloride

Calcium chloride anhydrous, granular ~ 1-2 mm

102379

Calcium chloride

Calcium chloride anhydrous, granular ~ 6 - 14 mm

102392

Calcium chloride

assay

≥98.0%

assay

≥93%

assay

≥95.0% (complexometric)

assay

~90% (complexometric)

Quality Level

200

Quality Level

-

Quality Level

200

Quality Level

200

density

2.15 g/cm3 at 20 °C

density

-

density

2.15 g/cm3 at 20 °C

density

2.15 g/cm3 at 20 °C

impurities

≤0.2% Free alkali (as Ca(OH)2)

impurities

-

impurities

≤0.2% Free alkali (as Ca(OH)2)

impurities

≤0.2% Free alkali (as Ca(OH)2)

pH

8-10 (20 °C, 100 g/L in H2O)

pH

-

pH

8-10 (20 °C, 100 g/L in H2O)

pH

8-10 (20 °C, 100 g/L in H2O)

General description

Molecular sieves are made up of three dimensional interconnecting networks of silica and alumina tetrahedral. These crystalline metal aluminosilicates have uniform cavities to selectively adsorb specific size molecules. A 4A molecular sieve has an effective pore size of 4Å.

Application

Molecules with an effective diameter of 4 Å, including H2O, H2S, CO2, SO2, C2H4 and C3H6 are adsorbed.

Legal Information

SYLOSIV is a registered trademark of W.R. Grace & Co.-Conn.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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    Certificates of Analysis (COA)

    Lot/Batch Number
    0000427507
    0000427507
    0000419187
    0000419186
    0000419187

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