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Magnesium Oxide Board

MasterFormat 07 42 00 Wall Panels

This information reflects our best understanding of product composition in 2023.

Magnesium oxide (MgO) boards are cement fiberboards that may be used as an alternative to gypsum board for sheathing, subfloors, underlayment, and partitions. The boards are commonly composed of magnesium oxysulfate cement, a lightweight filler...

More about Magnesium Oxide Board

Magnesium oxide (MgO) boards are cement fiberboards that may be used as an alternative to gypsum board for sheathing, subfloors, underlayment, and partitions. The boards are commonly composed of magnesium oxysulfate cement, a lightweight filler such as perlite, wood fiber, and a fiberglass scrim. Magnesium oxychloride cement, or Sorel cement, is an alternative binder to magnesium oxysulfate cement though it is less commonly used and therefore outside the scope of this research. Magnesium chloride may still be present in small quantities in some magnesium oxysulfate products. A possible reason that magnesium oxysulfate cement is more commonly used is that the chloride content of the boards, when in contact with moisture, may result in moisture damage or "weeping boards". Various binders can be used in alkali-resistant fiberglass scrim. It is not clear what specific binder is common for scrim used in MgO boards. See the All Contents for other possible binders.

Name % Weight Whole Function GREENSCREEN® Sources
Magnesium oxide
1309-48-4
49.81% Binder Subscribe to view
Water
7732-18-5
17.73% Binder Subscribe to view
Magnesium sulfate anhydrous
7487-88-9
10.96% Binder Subscribe to view
Silicon dioxide
7631-86-9
2.85% Binder Subscribe to view
FERROUS OXIDE
1345-25-1
2.00% Binder Subscribe to view
CHLORIDE
16887-00-6
1.80% Residual Subscribe to view
Aluminum oxide
1344-28-1
0.49% Binder Subscribe to view
Wood dust - unspecified
7.83% Filler Subscribe to view
PERLITE
130885-09-5
4.14% Filler Subscribe to view
Phosphate ion
14265-44-2
1.47% Nucleating agent Subscribe to view
Fiberglass
65997-17-3
0.55% Fiberglass Mesh Subscribe to view
Polyvinyl chloride
9002-86-2
0.24% Alkali-resistant Coating Subscribe to view
Diisononyl phthalate (DINP-1, mixture of isomers as manufactured)
68515-48-0
0.13% Plasticizer Subscribe to view
Name % Weight Part % Weight Whole Function GREENSCREEN® Sources
Magnesium Oxysulfate Cement
85.64% 85.64% Binder Subscribe to view
Magnesium oxide
1309-48-4
(Nested within Magnesium Oxysulfate Cement)
58.16% 49.81% Binder Subscribe to view
Water
7732-18-5
(Nested within Magnesium Oxysulfate Cement)
20.71% 17.73% Binder Subscribe to view
Magnesium sulfate anhydrous
7487-88-9
(Nested within Magnesium Oxysulfate Cement)
12.80% 10.96% Binder Subscribe to view
Silicon dioxide
7631-86-9
(Nested within Magnesium Oxysulfate Cement)
3.33% 2.85% Binder Subscribe to view
FERROUS OXIDE
1345-25-1
(Nested within Magnesium Oxysulfate Cement)
2.33% 2.00% Binder Subscribe to view
CHLORIDE
16887-00-6
(Nested within Magnesium Oxysulfate Cement)
2.11% 1.80% Residual Subscribe to view
Aluminum oxide
1344-28-1
(Nested within Magnesium Oxysulfate Cement)
0.58% 0.49% Binder Subscribe to view
Wood dust - unspecified
7.83% 7.83% Filler Subscribe to view
PERLITE
130885-09-5
4.14% 4.14% Filler Subscribe to view
Phosphate ion
14265-44-2
1.47% 1.47% Nucleating agent Subscribe to view
Alkali-Resistant Fiberglass Scrim
0.92% 0.92% Structure component Subscribe to view
Fiberglass
65997-17-3
(Nested within Alkali-Resistant Fiberglass Scrim)
60.28% 0.55% Fiberglass Mesh Subscribe to view
Polyvinyl chloride
9002-86-2
(Nested within Alkali-Resistant Fiberglass Scrim)
25.60% 0.24% Alkali-resistant Coating Subscribe to view
Diisononyl phthalate (DINP-1, mixture of isomers as manufactured)
68515-48-0
(Nested within Alkali-Resistant Fiberglass Scrim)
14.12% 0.13% Plasticizer Subscribe to view

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Known or Potential Residuals

Known or Potential Residuals for Chemical
CASRN NAME GREENSCREEN® TYPE FREQUENCY % Weight Chemical % Weight Product SOURCE
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Other Process Chemicals

Other Process Chemicals for Chemical
CASRN NAME GREENSCREEN® TYPE FREQUENCY % WT CHEM % WT PRODUCT SOURCES
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Habitable Resources (0)

Habitable Resources for Product
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Sources

Sources for Common Product Data
Source Uploaded Document Linked Document
AikenEtAl_2020
Ambient_MagPanel_Web
Arborcoustic Brochure
BAUX Wood Wool Data Sheet
BAUX Wood Wool HPD
Botterman et al - 2018
Cardinal Acoustics Brochure
Cardinal Acoustics EPD
Cardinal Acoustics Wall & Ceiling Panels Declare
Cardinal Acoustics Wall & Ceiling Panels HPD
Celenit Acoustic Panels EPD
Cement Board Construction
CN101871246B
DragonBoard_FAQ
DragonBoard_SDS
DragonBoard_SubmittalSheet
DragonBoard_Web
Durock Cement Board PDS
Durock Cement Board SDS
Exacor_SDS
FAO_MgSO4
Gomes and Camarini - 2014
Heradesign Acoustic Panel Brochure
Heradesign Acoustic Panel EPD
LiEtAl_2009
MagMatrix_blog
MagMatrix_web
Magpael_MgCl_MgSO4_Comp
Magpael_MgSO4_SDS
Magply_SDS
Magply_web
Malewska
MAXTERRA_SDS
MOCA_StandardMgOBoard
MPI_About
NeilsenEtAl_2019
NP SILVER C1000 Mold Release Agent SDS
Patent CN103304258A
Patent EP2025700A1
PermaBase HPD
ProTec SDS
ResCom_HPD
Rise_MgO
ROCKMAX_web
StrandTec HPD
StrandTec Spec - Direct Attach Wall
StrandTec Spec - Lay-In Ceiling
StrandTec TDS
Tectum Brochure
Tectum Ceiling and Wall Panels Declare
Tectum Ceiling and Wall Panels EPD
Tectum Ceiling and Wall Panels HPD
Troldtekt Acoustic Panel EPD
USDA_MgSO4
USG US20140138007A1
WonderBoard Lite HPD