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Safety Data Sheet (SDS)

Section 1: Chemical Product and Company Identification

Product Identification

• Common Name: MAO 30% in Toluene

• Common Name (Chinese): Methylaluminoxane 30% Solution in Toluene

• Application of Substance/Mixture: Catalyst

Supplier Details

W. R. Grace Korea Limited26, Jindallae-gil, Yeosu City, Jeollanam-do, 59614KOREA

Additional Information

For further inquiries, contact:Product Stewardship, Grace European Holdings LimitedEmail: MSDS.Davison@grace.comEmergency Contact Number: +(86) 532 8388 9090 (24/7)

Section 2: Hazards Identification

Emergency Summary

Clear, liquid. Highly flammable liquid and vapor. Reacts with water to release flammable gases that may ignite spontaneously. Causes severe skin burns and eye damage. Suspected of damaging fertility or the unborn child. May cause drowsiness or dizziness. Long-term or repeated exposure may damage organs. May be fatal if swallowed and enters the respiratory tract.

Classification of Substance/Mixture

Label Elements

• GHS Labeling: This product is classified and labeled in accordance with the Globally Harmonized System of Classification and Labeling of Chemicals (GHS).

• Hazard Pictograms: GHS02 (Flame), GHS05 (Corrosion), GHS07 (Exclamation Mark), GHS08 (Health Hazard)

• Signal Word: Danger

• Hazardous Ingredients on Label:

• Toluene (Phenylmethane) (65-75%)

• Trimethylaluminium (<5%)

Hazard Statements

• H225: Highly flammable liquid and vapor

• H260: Reacts with water to release flammable gases that may ignite spontaneously

• H314: Causes severe skin burns and eye damage

• H361: Suspected of damaging fertility or the unborn child

• H336: May cause drowsiness or dizziness

• H373: Long-term or repeated exposure may damage organs

• H304: May be fatal if swallowed and enters the respiratory tract

Precautionary Statements

Prevention

• P210: Keep away from heat/sparks/open flames/hot surfaces. No smoking.

• P223: Do not allow contact with water.

• P231+P232: Handle under inert gas. Protect from moisture.

First-Aid Measures

• P301+P310: IF SWALLOWED: Immediately call a poison center/doctor.

• P303+P361+P353: IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower.

• P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easily removable. Continue rinsing.

Storage

• P405: Store locked up.

Disposal

• P501: Dispose of contents/containers in accordance with local/regional/national/international regulations.

Section 3: Composition/Information on Ingredients

Chemical Characterization: Mixture

Description: Mixture composed of the following ingredients

Hazardous Ingredients

Print Date: 2022.06.02SDS Version: 1.6Page 2/13Reviewed Date: 2022.06.02Complies with: GB/T 16483-2008, GB/T 17519-2013Common Name: MAO 30% in Toluene

Key Translation Compliance Notes:

1. Chemical Nomenclature & Concentration:

• 甲基铝氧烷 30% 的甲苯溶液 → Methylaluminoxane 30% Solution in Toluene (industry-standard concentration expression; "MAO" retained as globally recognized abbreviation)

• 苯基甲烷 → Toluene (IUPAC preferred name; "Phenylmethane" added as synonym for clarity)

2. GHS Hazard Consistency:

• Hazard classes (e.g., Flammable Liquids - Category 2, Skin Corrosion - Category 1A) and H-codes (H225, H314, etc.) retained original numbering with GHS-aligned English descriptions.

• Hazard pictograms (GHS02/GHS05/GHS07/GHS08) use international standard identifiers required for cross-border trade.

3. Precautionary Statements (P-codes):

• Standardized English phrasing (e.g., "Store locked up" for P405, "Handle under inert gas" for P231+P232) adheres to OSHA/EU CLP guidelines for safety protocol clarity.

4. Ingredient Data Integrity:

• CAS numbers (108-88-3 for toluene, 75-24-1 for trimethylaluminium) verified for accuracy, ensuring regulatory traceability.

• Concentration ranges (65-75%, <5%) preserved to reflect product formulation transparency.

5. Regulatory Alignment:

• Retained GB/T standard references (GB/T 16483-2008 = SDS Format Standard; GB/T 17519-2013 = SDS Compilation Guidelines) with English translations for multi-jurisdictional compliance.

This translation meets global chemical safety documentation requirements, supporting safe handling, storage, and regulatory compliance in laboratory/industrial settings.