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358983

Sigma-Aldrich

Ammonium sulfite monohydrate

92%

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About This Item

Linear Formula:
(NH4)2SO3 · H2O
CAS Number:
7783-11-1
Molecular Weight:
134.16
EC Number:
233-484-9
MDL number:
MFCD00150959
UNSPSC Code:
12352300
PubChem Substance ID:
329755233
NACRES:
NA.55

Quality Level

100

Assay

92%

form

crystals

density

1.41 g/mL at 25 °C (lit.)

SMILES string

N.N.O.OS(O)=O

InChI

1S/2H3N.H2O3S.H2O/c;;1-4(2)3;/h2*1H3;(H2,1,2,3);1H2

InChI key

ASPXBYAQZVXSNS-UHFFFAOYSA-N

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General description

Ammonium sulfite monohydrate is generally used as a reducing agent and sulfonating agent in the organic synthesis.

Application

Ammonium sulfite monohydrate is used in the wafers cleaning, etching, and silicon modification procedures.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315 - H319

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2

Supplementary Hazards

EUH031

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 3

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.

EU REACH Annex XVII (Restriction List)

CAS No.

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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8.01221

Ammonium sulfite

Yan B Vogel et al.
Nature communications, 8(1), 2066-2066 (2017-12-14)
Predicting or manipulating charge-transfer at semiconductor interfaces, from molecular electronics to energy conversion, relies on knowledge generated from a kinetic analysis of the electrode process, as provided by cyclic voltammetry. Scientists and engineers encountering non-ideal shapes and positions in voltammograms

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