XPS Insulation (extruded polystyrene)
Common Product
MasterFormat 07 20 00 Thermal Protection; 07 24 00 Exterior Insulation and Finish Systems

This information reflects our best understanding of product composition in 2019.

ASTM C578 defines extruded polystyrene (XPS) thermal insulation as a, "cellular plastic product manufactured in a one stage process by extrusion and expansion of the base polymer in the presence of blowing agent(s) resulting in a product...

More about XPS Insulation (extruded polystyrene)

ASTM C578 defines extruded polystyrene (XPS) thermal insulation as a, "cellular plastic product manufactured in a one stage process by extrusion and expansion of the base polymer in the presence of blowing agent(s) resulting in a product which is rigid with closed cellular structure." XPS foams fall into ASTM C578 Types IV, V, VI, VII, X, XII and XIII. Rigid XPS boards contain flame retardants, blowing agents, and additives. Some boards may have facing materials. Most products contain some sort of colorant but the specific colorant varies across products so is not included here. This CP describes unfaced, rigid XPS foam insulation boards suitable for a range of insulating applications. XPS insulation commonly contains around 20% pre-consumer recycled content.

Major XPS manufacturers indicate they have transitioned away from the use of HBCD (a persistent, bioaccumulative, toxicant) as a flame retardant, typically in favor of the flame retardant listed here, though the alternative used is not always disclosed. Products from smaller manufacturers could potentially still use HBCD. In addition, some products may contain a flame retardant promotor or synergist, which could add additional hazards. While the European trade association for XPS insulation indicates their members use halogen-free blowing agents, the US XPS industry continues to use high global warming potential HFC blowing agents.

A historical version of this CP is available here: https://www.pharosproject.net/material/show/2180362.

Name % Wt Whole Function GS Score Sources
Polystyrene
9003-53-6
88.32% base resin LT-UNK
T 1,1,1,2-TETRAFLUOROETHANE (HFC-134A)
811-97-2
6.20% blowing agent LT-UNK
Methyl formate
107-31-3
2.20% blowing agent LT-UNK
T benzene, ethenyl-, polymer with 1,3- butadiene, brominated
1195978-93-8
1.67% flame retardant LT-1
Pentane
109-66-0
0.91% blowing agent LT-P1
Talc
14807-96-6
0.26% nucleating agent BM-1
Irganox 1010
6683-19-8
0.20% stabilizer LT-UNK
Epichlorohydrin, o-cresol, formaldehyde polymer
29690-82-2
0.13% stabilizer LT-UNK
Calcium stearate
1592-23-0
0.09% lubricant LT-UNK
Irganox 242
26741-53-7
0.02% stabilizer LT-UNK
Name % Wt Part % Wt Whole Function GS Score Sources
Polystyrene
9003-53-6
88.32% 88.32% base resin LT-UNK
T 1,1,1,2-TETRAFLUOROETHANE (HFC-134A)
811-97-2
6.20% 6.20% blowing agent LT-UNK
Methyl formate
107-31-3
2.20% 2.20% blowing agent LT-UNK
T benzene, ethenyl-, polymer with 1,3- butadiene, brominated
1195978-93-8
1.67% 1.67% flame retardant LT-1
Pentane
109-66-0
0.91% 0.91% blowing agent LT-P1
Talc
14807-96-6
0.26% 0.26% nucleating agent BM-1
Irganox 1010
6683-19-8
0.20% 0.20% stabilizer LT-UNK
Epichlorohydrin, o-cresol, formaldehyde polymer
29690-82-2
0.13% 0.13% stabilizer LT-UNK
Calcium stearate
1592-23-0
0.09% 0.09% lubricant LT-UNK
Irganox 242
26741-53-7
0.02% 0.02% stabilizer LT-UNK

This is not necessarily representative of all possible content that may be found in this product type. Learn more

Base resin
Name GS Score Sources
  C Polystyrene
9003-53-6
LT-UNK
    AS Resin
9003-54-7
LT-UNK
Blowing agent
Name GS Score Sources
T C 1,1,1,2-TETRAFLUOROETHANE (HFC-134A)
811-97-2
LT-UNK
  C Methyl formate
107-31-3
LT-UNK
  C Pentane
109-66-0
LT-P1
T   1,1-Difluoroethane
75-37-6
LT-UNK
T   1,3,3,3-Tetrafluoropropene, (1E)-
29118-24-9
LT-UNK
    Carbon dioxide
124-38-9
LT-UNK
    Dimethyl ether
115-10-6
LT-UNK
    Isobutane
75-28-5
LT-P1
    Methyl chloride
74-87-3
LT-1
    Water
7732-18-5
BM-4
Filler
Name GS Score Sources
    Carbon black
1333-86-4
BM-1
    Graphite
7782-42-5
LT-UNK
Flame retardant
Name GS Score Sources
T C benzene, ethenyl-, polymer with 1,3- butadiene, brominated
1195978-93-8
LT-1
T   Hexabromocyclododecane
25637-99-4
LT-1
    poly-1-4-diisopropyl benzene
25822-43-9
NoGS
T   Tetrabromobisphenol A bis(2,3-dibromopropyl ether)
21850-44-2
LT-1
    TRIPHENYL PHOSPHATE
115-86-6
BM-2
    Triphenylphosphine oxide
791-28-6
LT-P1
Lubricant
Name GS Score Sources
  C Calcium stearate
1592-23-0
LT-UNK
Nucleating agent
Name GS Score Sources
  C Talc
14807-96-6
BM-1
    Kaolin
1332-58-7
LT-UNK
    Titanium dioxide
13463-67-7
LT-1
Pigment
Name GS Score Sources
    Proprietary Pigment
 
Stabilizer
Name GS Score Sources
  C Epichlorohydrin, o-cresol, formaldehyde polymer
29690-82-2
LT-UNK
  C Irganox 1010
6683-19-8
LT-UNK
  C Irganox 242
26741-53-7
LT-UNK
    a reaction mixture of dipentaerythritol adipic acid (tradename: PlenlizerTM ST210)
56509-15-0
NoGS
    Aromatic amine antioxidant
 
    Bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite
80693-00-1
LT-UNK
    Brominated epoxy stabilizer
 
Known or Potential Residuals
Known or Potential Residuals for Chemical
CASRN NAME GS SCORE TYPE FREQUENCY % WT CHEM % WT PRODUCT SOURCE
Login to view Known or Potential Residuals
Other Process Chemicals
CASRN NAME GS Score TYPE FREQUENCY % WT CHEM % WT PRODUCT SOURCES
Login to view Other Process Chemistry
HBN Resources (4)
HBN Resources for Product
TYPE TITLE
Report Full Disclosure Required: A Strategy to Prevent Asthma Through Building Product Selection
Report TSCA Workplan Chemicals Reports
Report Making Affordable Multifamily Housing More Energy Efficient: A Guide to Healthier Upgrade Materials
Tool Insulation Hazard Spectrum
Sources
Sources for Common Product Data
Source Uploaded Document Linked Document
ADK data sheet
BuildingGreen HBCD Article
Certifoam SDS
Chemical Watch article
Dow Patent
ECN 1280 CAS
Emerald 3000
EPA Blowing Agents
EPA HBCD Alternatives Assessment
Exiba EPD
Foamular Data Sheet
Foamular EPD
Foamular SDS
Gabriel Chemie Additives
GreenGuard Fact Sheet
GreenGuard SDS
GreenGuard Technical Bulletin
Innovex paper
JSP Patent
Kaneka Patent
OC Patent
Owens Corning Sustainability Report
Plenlizer ST210 CAS
Poly-1,4 CAS
Styrofoam Ingredient Reporting
Styrofoam SDS
Styrofoam TDS
Styrofoam Ultra Ingredient Reporting
UNEP report
XPSA - ASTM C578