Note: Ingredients listed on restricted chemical lists
EC/CAS
215-202-6/1313-13-9
Name of the chemical
Manganese dioxide
Concentration
15-60
EC/CAS
204-407-6/120-55-8
Name of the chemical
DEGDB, Oxydiethylene-dibenzoate
Concentration
15-45
EC/CAS
248-258-5/27138-31-4
Name of the chemical
DPGDB, Oxydipropyl dibenzoate
Concentration
<15
EC/CAS
231-545-4/7631-86-9
Name of the chemical
Silver adsorbed on silicon dioxide
Concentration
<5
EC/CAS
215-691-6/1344-28-1
Name of the chemical
aluminium oxide
Concentration
<3
EC/CAS
215-609-9/1333-86-4
Name of the chemical
carbon black
Concentration
<2.5
EC/CAS
272-697-1/68909-20-6
Name of the chemical
Silanamine, 1,1,1-trimethyl-N-(trimethylsilyl)-, hydrolysis products with silica
Concentration
<2
EC/CAS
215-185-5/1310-73-2
Name of the chemical
sodium hydroxide
Concentration
<2
General Information
Version
1.00
Revision date
2026-09-02
Product name
Aerospace Sealant AC-251 B-2 Catalyst
Emergency telephone
+44 (0)1344 858 000
Icons in SDS
Company Information
company name
3M United Kingdom PLC
e-mail address of the competent person responsible for the Safety Data Sheet
tox.uk@mmm.com
GHS Information
Signal word
Danger
Hazard Codes
Hazard statements (CLP)
H302, H315, H318, H373
Hazard statements
Code
Statements
H302
Harmful if swallowed
Section 2
SECTION 2: Hazards identification
No 1272/2008 Classification of the substance or mixture
Hazard pictograms
GHS05 (Corrosion) |GHS07 (Exclamation mark) |GHS08 (Health Hazard) | Ingredient CAS Nbr EC No. % by Wt manganese dioxide 1313-13-9 215-202-6 15 - 60 Disodium oxide 1313-59-3 215-208-9 < 3 Dipotassium oxide 12136-45-7 235-227-6 < 2
Hazard statements
H302 Harmful if swallowed. H315 Causes skin irritation. H318 Causes serious eye damage. H373 May cause damage to organs through prolonged or repeated exposure: nervous system.
Prevention
P260A Do not breathe vapours. P280A Wear eye/face protection.
Response
P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P310 Immediately call a POISON CENTRE or doctor/physician. 1% of the mixture consists of components of unknown acute oral toxicity.
2.3 Other hazards
None known. This material does not contain any substances that are assessed to be a PBT or vPvB
2.1 Classification of the substance or mixture
The retained CLP Regulation (EU) No 1272/2008 as amended for Great Britain The health and environmental classifications of this material have been derived using the calculation method, except in cases where test data are available or the physical form impacts classification. Classification(s) based on test data or physical form are noted below, if applicable. CLASSIFICATION: Acute Toxicity, Category 4 - Acute Tox. 4; H302 Skin Corrosion/Irritation, Category 2 - Skin Irrit. 2; H315 Serious Eye Damage/Eye Irritation, Category 1 - Eye Dam. 1; H318 Specific Target Organ Toxicity-Repeated Exposure, Category 2 - STOT RE 2; H373 For full text of H phrases, see Section 16. 2.2. Label elements The retained CLP Regulation (EU) No 1272/2008 as amended for Great Britain SIGNAL WORD DANGER. Symbols GHS05 (Corrosion) |GHS07 (Exclamation mark) |GHS08 (Health Hazard) | Pictograms Ingredient CAS Nbr EC No. % by Wt manganese dioxide 1313-13-9 215-202-6 15 - 60 Disodium oxide 1313-59-3 215-208-9 < 3 Dipotassium oxide 12136-45-7 235-227-6 < 2 HAZARD STATEMENTS: H302 Harmful if swallowed. H315 Causes skin irritation. H318 Causes serious eye damage. H373 May cause damage to organs through prolonged or repeated exposure: nervous system. PRECAUTIONARY STATEMENTS Prevention: P260A Do not breathe vapours. P280A Wear eye/face protection. Response: P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P310 Immediately call a POISON CENTRE or doctor/physician. 1% of the mixture consists of components of unknown acute oral toxicity. 2.3. Other hazards None known. This material does not contain any substances that are assessed to be a PBT or vPvB SECTION 3: Composition/information on ingredients 3.1. Substances Not applicable 3.2. Mixtures Ingredient Identifier(s) % Classification according to Regulation (EC) No. 1272/2008 [CLP], as amended for GB manganese dioxide (CAS-No.) 1313-13-9 15 - 60 Acute Tox. 4, H332 (EC-No.) 215-202-6 Acute Tox. 4, H302 EUH031 STOT RE 2, H373 Oxydiethylene dibenzoate (CAS-No.) 120-55-8 15 - 45 Substance not classified as hazardous (EC-No.) 204-407-6 Oxydipropyl dibenzoate (CAS-No.) 27138-31-4 < 15 Aquatic Chronic 3, H412 (EC-No.) 248-258-5 Zeolites (CAS-No.) 1318-02-1 1 - 10 Substance with a national occupational (EC-No.) 215-283-8 exposure limit Silicon dioxide (CAS-No.) 7631-86-9 < 5 Substance with a national occupational (EC-No.) 231-545-4 exposure limit Disodium oxide (CAS-No.) 1313-59-3 < 3 EUH014 (EC-No.) 215-208-9 Acute Tox. 3, H301 Skin Corr. 1B, H314 STOT SE 3, H335 Aluminium Oxide (non-fibrous) (CAS-No.) 1344-28-1 < 3 Substance with a national occupational (EC-No.) 215-691-6 exposure limit Carbon black (CAS-No.) 1333-86-4 < 2.5