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11044

Sigma-Aldrich

Aluminum sulfate octadecahydrate

puriss., meets analytical specification of Ph. Eur., BP, 100-110%, 51.0-59.0% Al2(SO4)3 basis

Synonym(s):

Aluminum sulfate hydrate

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About This Item

Linear Formula:
Al2(SO4)3 · 18H2O
CAS Number:
7784-31-8
Molecular Weight:
666.43
EC Number:
233-135-0
UNSPSC Code:
12352302
PubChem Substance ID:
24846984
NACRES:
NA.21

grade

puriss.

Assay

100-110%

form

crystals or chunks

quality

meets analytical specification of Ph. Eur., BP

concentration

51.0-59.0% Al2(SO4)3

impurities

residual solvents, complies
≤0.002% heavy metals (as Pb)
≤0.003% ammonium (NH4)
≤0.2% sub.not precip.b.NH4OH(SO4)

pH

2.5-4.0 (20 °C, 2%)

anion traces

chloride (Cl-): ≤50 mg/kg

cation traces

As: ≤3 mg/kg
Fe: ≤50 mg/kg

suitability

complies for appearance of solution

SMILES string

O=S(O)(O)=O.[AlH2][AlH2].O

InChI

1S/2Al.3H2O4S.9H2O/c;;3*1-5(2,3)4;;;;;;;;;/h;;3*(H2,1,2,3,4);9*1H2/q2*+3;;;;;;;;;;;;/p-6

InChI key

KFCWRPFNNIEZRY-UHFFFAOYSA-H

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General description

Aluminum sulfate octadecahydrate (Al2(SO4)3.18H2O) is a hydrated aluminum salt. It is used as a catalyst and cross-linker during chemical reactions. Aluminum sulfate octadecahydrate is also used as a coagulating agent/flocculating agent in the purification of drinking water and wastewater treatment plants. It is also used in the paper industry for sizing.

Application

Aluminum sulfate octadecahydrate is used:
  • As a trace water source in the synthesis of cancrinite zeolite from geophagic clay.
  • In the solvent free synthesis of ZSM-5 Zeolites from rice husk silica.
  • In the preparation of polymeric metal complex dyes.

Pictograms

Corrosion
GHS05

Signal Word

Danger

Hazard Statements

H290,H314

Hazard Classifications

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

Storage Class Code

8B - Non-combustible corrosive hazardous materials

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

ISHL Indicated Name

Substances Subject to be Indicated Names

ISHL Notified Names

Substances Subject to be Notified Names

JAN Code

11044-6X2.5KG:
11044-1KG:4548173983707
11044-VAR:
11044-BULK:
11044-BULK-H:
11044-20KG-H:
11044-25KG-H:
11044-6X1KG:
11044-2.5KG:4548173983714

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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