SDS No. M0026
Effective Date: 07/10/2015
(a) Product identifier used on the labelFIBERMAX® POLYCRYSTALLINE WOOL PRODUCTS
FIBERSFibermax® Bulk; Fibermax®-A; Fibermax®-TG
MATSFibermax® Mat; Fibermax® LS Mat
Power-Loc® 30; Screw-Loc® 30; Thread-Loc® 30; Weld-Loc® 30
BLANKETSFibermax® Needled Blankets
(b) Other means of identificationPolycrystalline fiber, polycrystalline wool (PCW), man-made alumina fiber, high temperature insulation wool (HTIW)
(c) Recommended use of the chemical and restrictions on usePCW materials are used primarily in industrial high temperature insulating applications. Examples include heat shields, heat containment, gaskets, expansion joints, industrial furnaces, ovens, kilns, boilers and other process equipment and applications. PCW based products are not intended for direct sale to the general public. While PCWs are used in the manufacture of some consumer products, such as catalytic converter mats, the materials are contained, encapsulated, or bonded within the units.
d) Name, address, and telephone numberUnifrax I LLC
600 Riverwalk Parkway, Suite 120
Tonawanda, NY 14150
Product Stewardship Information Hotline
1-800-322-2293 (Monday - Friday 8:00 a.m. - 4:30 p.m. EST)
For additional SDSs, visit our web page, http: //, or call Unifrax Customer Service at (716) 768-6500
(e) Emergency phone numberCHEMTREC will provide assistance for chemical emergencies. Call 1-800-424-9300

(a) Classification of the chemical in accordance with paragraph (d) of §1910.1200
(b) Signal word, hazard statement(s), symbol(s) and precautionary statement(s) in accordance with paragraph (f) of §1910.1200

(c) Describe any hazards not otherwise classified that have been identified during the classification process
(d) Mixture rule

(a) Chemical and (b) Common Name(c) CAS Number
Polycrystalline Wools (PCW)
CAS Name: basic aluminium chloride
reaction products with silica

*PCW can also be identified by a combination of CAS Numbers: 1344-28-1 (fibrous forms of Aluminium Oxide), 7631-86-9 (Silica, non-crystalline), or 1302-93-8 (Mullite).
(See Section 8 "Exposure Controls / Personal Protection" for exposure guidelines)


(a) Description of necessary measures, subdivided according to the different routes of exposure, i.e., inhalation, skin and eye contact, and ingestion
(b) Most important symptoms/effects, acute and delayed

(c) Indication of immediate medical attention and special treatment needed, if necessary

(a) Suitable (and unsuitable) extinguishing media and

(b) Specific hazards arising from the chemical (e.g., nature of any hazardous combustion products):
(c) Special protective equipment and precautions for fire-fighters
(a) Personal precautions, protective equipment, and emergency procedures (b) Methods and materials for containment and cleaning up


(a) Precautions for safe handling (b) Conditions for safe storage, including any incompatibilities

(a) OSHA permissible exposure limit (PEL), American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV), and any other exposure limit used or recommended by the chemical manufacturer, importer, or employer preparing the safety data sheet, where available

Aluminosilicate fiber (polycrystalline)

Particulates Not Otherwise Regulated (PNOR) : Total Dust -- 15 mg/m³. Respirable Fraction -- 5 mg/m³
Particulates Not Otherwise Classified (PNOC) : Inhalable particulate -- 10 mg/m³. Respirable particulate -- 3 mg/m³
See below*

* As with most industrial materials, it is prudent to minimize unnecessary exposure to respirable dusts. Note that Industrial hygiene standards and occupational exposure limits differ between countries and local jurisdictions. Check with your employer to identify any "respirable dust", "total dust" or "fiber" exposure standards to follow in your area. If no regulatory dust or fiber control standard apply, a qualified industrial hygiene professional can assist with a specific evaluation of workplace conditions and the identification of appropriate respiratory protection practices. In the absence of other guidance, the supplier has found that it is generally feasible to control occupational fiber exposure to 0.5 f/cc or less.

The evaluation of occupational exposure limits and determining their relative applicability to the workplace is best performed, on a case-by-case basis, by a qualified Industrial Hygienist.

(b) Appropriate engineering controls

(c) Individual protection measures, such as personal protective equipment


(a) AppearanceWhite, fibrous wool(j) Upper/lower flammability or explosive limitsNot applicable
(b) OdorOdorless(k) Vapor pressureNot applicable
(c) Odor thresholdNot applicable(l) Vapor densityNot applicable
(d) pHNot applicable(m) Relative density2.50 – 2.75
(e) Melting point1760° C (3200° F)(n) SolubilityInsoluble
(f) Initial boiling point and boiling rangeNot applicable(o) Partition coefficient: n-octanol/waterNot applicable
(g) Flash pointNot applicable(p) Auto-ignition temperatureNot applicable
(h) Evaporation rateNot applicable(q) Decomposition temperatureNot applicable
(i) FlammabilityNot applicable(r) ViscosityNot applicable

(a) ReactivityPCW is non-reactive.
(b) Chemical stabilityAs supplied PCW is stable and inert.
(c) Possibility of hazardous reactionsNone
(d) Conditions to avoidPlease refer to handling and storage advice in Section 7
(e) Incompatible materialsNone
(f) Hazardous decomposition products

(a) through (d)

Toxicological Data/Epidemiology Data

Lifetime rat inhalation studies of polycrystalline fiber show that at the maximum dose level tested, there was no evidence of lung cancer, lung fibrosis or any other significant adverse effect. Intraperitoneal, intratracheal and intrapleural studies in rats, together with two in vitro tests, have all shown negative results. Despite some study limitations, it is important to note the consistent lack of carcinogenic response in animal studies.

As produced most polycrystalline fibers, including Saffil® and Fibermax®, have fiber diameters too large to be respirable. Numerous scientific studies suggest that the potential toxicity of a respirable fiber is directly related to bio-persistence (the length of time it take for the fiber to clear the lung). Based on limited in-vitro laboratory analysis, which measure the dissolution rate of fibers in simulated lung fluid, polycrystalline fibers are known to be relatively durable.

Data from respiratory surveillance studies are not available for PCW workers. In a small cohort of workers exposed to PCW with historical co-exposures to RCF and other fibers, there was no evidence of interstitial lung disease on chest x-rays nor an accelerated rate of loss of lung function on pulmonary function testing. Symptom responses could not be attributed to or excluded from exposure to PCW as a consequence of the prior fiber exposures.

(e) International Agency for Research on Cancer and National Toxicology Program

In 1988, the International Agency for Research on Cancer (IARC) considered the carcinogenicity of several groups of fibers. One grouping they considered was a poorly defined collection of disparate fiber types [polycrystalline fiber, refractory ceramic fiber (referred to as RCF) and single crystal whiskers] into a broad, single category they termed “ceramic fibers”. The IARC monograph clearly indicated that test data specific to polycrystalline fibers were negative, but according to the IARC classification principles, positive results with other fiber types led to the conclusion that all fibers in the group should be considered as possible human carcinogens (IARC Category 2B). In a subsequent monograph on MMVF (2002), IARC did not specifically re-evaluate polycrystalline fiber. The Annual Report on Carcinogens prepared by the National Toxicology Program (NTP), (latest edition) classified “ceramic fibers (respirable size)” as reasonably anticipated to be carcinogens.

(a) Ecotoxicity (aquatic and terrestrial, where available)No known aquatic toxicity.
(b) Persistence and degradabilityThese products are insoluble materials that remain stable over time and are chemically identical to inorganic compounds found in the soil and sediment; they remain inert in the natural environment.
(c) Bioaccumulative potentialNo bioaccumulative potential.
(d) Mobility in soilNo mobility in soil.
(e) Other adverse effects (such as hazardous to the ozone layer)No adverse effects of this material on the environment are anticipated.



To prevent waste materials from becoming airborne during waste storage, transportation and disposal, a covered container or plastic bagging is recommended.


This product, as manufactured, is not classified as a hazardous waste according to Federal regulations (40 CFR 261). Any processing, use, alteration or chemical additions to the product, as purchased, may alter the disposal requirements. Under Federal regulations, it is the waste generator's responsibility to properly characterize a waste material, to determine if it is a "hazardous" waste. Check local, regional, state or provincial regulations to identify all applicable disposal requirements.


(a) UN numberNot Applicable
(b) UN proper shipping nameNot Applicable
(c) Transport hazard class(es)Not Applicable
(d) Packing group, if applicableNot Applicable
(e) Environmental hazards (e.g., Marine pollutant (Yes/No))Not a marine pollutant
(f) Transport in bulk (according to Annex II of MARPOL 73/78 and the IBC Code)Not Applicable
(g) Special precautions which a user needs to be aware of, or needs to comply with, in connection with transport or conveyance either within or outside their premisesNot Applicable

Canadian TDG Hazard Class & PIN: Not regulated

Not classified as dangerous goods under ADR (road), RID (train) or IMDG (ship).



EPA:Superfund Amendments and Reauthorization Act (SARA) Title III - This product contains aluminum oxide (fibrous forms) which is reportable under Section 313 (40 CFR 372). Sections 311 and 312 (40 CFR 370) apply (delayed hazard).
Toxic Substances Control Act (TSCA) - PCW has been assigned a CAS number; however; it is an "article" under TSCA and therefore exempt from listing on the TSCA inventory.
Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) and the Clean Air Act (CAA) - This product contains fibers with an average diameter greater than one micron and thus is not considered a hazardous air pollutant.
OSHA:Comply with Hazard Communication Standards 29 CFR 1910.1200 and 29 CFR 1926.59 and the Respiratory Protection Standards 29 CFR 1910.134 and 29 CFR 1926.103.
California:“Ceramic fibers (airborne particles of respirable size)” is listed in Proposition 65, The Safe Drinking Water and Toxic Enforcement Act of 1986 as a chemical known to the State of California to cause cancer.
Other States:PCW products are not known to be regulated by states other than California; however, state and local OSHA and EPA regulations may apply to these products. If in doubt, contact your local regulatory agency.


Canada:Canadian Workplace Hazardous Materials Information System (WHMIS) – Classified as Class D2A – Materials Causing Other Toxic Effects
Canadian Environmental Protection Act (CEPA) - All substances in this product are listed, as required, on the Domestic Substance List (DSL)
Europe:The assessment of all available toxicological test data on polycrystalline fibrers during the REACH registration process resulted in a “no classification” conclusion.



Unifrax has established a program to provide customers with up-to-date information regarding the proper use and handling of polycrystalline fiber. In addition, Unifrax has also established a program to monitor airborne fiber concentrations at customer facilities. If you would like more information about this program, please call the Unifrax Product Stewardship Information Hotline at 1-800-322-2293.

The HTIW Coalition and the U.S. Occupational Safety and Health Administration (OSHA) are partners in PSP HTW, a comprehensive, multi-faceted risk management program designed to control and reduce workplace exposures to high temperature insulation wools (HTIW). For more information regarding PSP HTW, please visit


ACGIH:American Conference of Governmental Industrial Hygienists
ADR:Carriage of Dangerous Goods by Road (International Regulation)
CAA:Clean Air Act
CAS:Chemical Abstracts Service
CERCLA:Comprehensive Environmental Response, Compensation and Liability Act
DSL:Domestic Substances List
EPA:Environmental Protection Agency
EU:European Union
f/cc:Fibers per cubic centimeter
HEPA:High Efficiency Particulate Air
HMIS:Hazardous Materials Identification System
IARC:International Agency for Research on Cancer
IATA:International Air Transport Association
IMDG:International Maritime Dangerous Goods Code
mg/m³:Milligrams per cubic meter of air
mmpcf: Million particles per cubic meter
NFPA:National Fire Protection Association
NIOSH:National Institute for Occupational Safety and Health
OSHA:Occupational Safety and Health Administration
29 CFR 1910.134 & 1926.103:OSHA Respiratory Protection Standards
29 CFR 1910.1200 & 1926.59:OSHA Hazard Communication Standards
PEL:Permissible Exposure Limit (OSHA)
PIN:Product Identification Number
PNOC:Particulates Not Otherwise Classified
PNOR:Particulates Not Otherwise Regulated
PSP:Product Stewardship Program
RCRA:Resource Conservation and Recovery Act
REL:Recommended Exposure Limit (NIOSH)
RID:Carriage of Dangerous Goods by Rail (International Regulations)
SARA:Superfund Amendments and Reauthorization Act
SARA Title III:Emergency Planning and Community Right to Know Act
SARA Section 302:Extremely Hazardous Substances
SARA Section 304:Emergency Release
SARA Section 311:MSDS/List of Chemicals and Hazardous Inventory
SARA Section 312:Emergency and Hazardous Inventory
SARA Section 313:Toxic Chemicals and Release Reporting
STEL:Short Term Exposure Limit`
SVF:Synthetic Vitreous Fiber
TDG:Transportation of Dangerous Goods
TLV:Threshold Limit Value (ACGIH)
TSCA:Toxic Substances Control Act
TWA:Time Weighted Average
WHMIS:Workplace Hazardous Materials Information System (Canada)

Revision Summary: Updated to align with OSHA HCS 2012
Revison Date: 07/10/2015



The information presented herein is presented in good faith and believed to be accurate as of the effective date of this Safety Data Sheet. Employers may use this SDS to supplement other information gathered by them in their efforts to assure the health and safety of their employees and the proper use of the product. This summary of the relevant data reflects professional judgment; employers should note that information perceived to be less relevant has not been included in this SDS. Therefore, given the summary nature of this document, Unifrax I LLC does not extend any warranty (expressed or implied), assume any responsibility, or make any representation regarding the completeness of this information or its suitability for the purposes envisioned by the user.