Simon wrote:

Does anyone know what Formula 409 consists of as it is not in my
supermarket or chemistry book? Is it just a local product in one country
or maybe it is just acetone, alcohol or methylated spirits under a fancy
name?


From the MSDS for 409.

-Chuck

================================================== =========================
Ingredients/Identity Information
================================================== =========================
Proprietary: NO
Ingredient: 2-BUTOXYETHANOL (ETHYLENEGLYCOL MONOBUTYL ETHER), BUTYL
CELLOSOLVE, BUTYL GLYCOL, GLYCOL ETHER EB
Ingredient Sequence Number: 01
Percent: 0.5-5
NIOSH (RTECS) Number: KJ8575000
CAS Number: 111-76-2
OSHA PEL: 50 PPM (SKIN)
ACGIH TLV: 25 PPM (SKIN)
Other Recommended Limit: 25 PPM (SKIN)
-------------------------------------
Proprietary: NO
Ingredient: ETHYLENE OXIDE (SUSPECTED 2A HUMAN CARCINOGEN BY IARC;
CONFIRMED ANIMAL CARINOGEN BY IARC & NTP)
Ingredient Sequence Number: 02
Percent: TRACE
NIOSH (RTECS) Number: KX2450000
CAS Number: 75-21-8
ACGIH TLV: 1.8 MG/CUM (A2)
-------------------------------------
Proprietary: NO
Ingredient: GLYCOL ETHERS, DIETHYLENE GLYCOL, 2,2-OXYBISETHANOL
Ingredient Sequence Number: 03
Percent: 10
NIOSH (RTECS) Number: ID5950000
CAS Number: 111-46-6
-------------------------------------
Proprietary: NO
Ingredient: MAGNESIUM SODIUM ETHYLENEDIAMINETETRAACETATE *92-2*
Ingredient Sequence Number: 04
Percent: 1
NIOSH (RTECS) Number: 1007734MS
CAS Number: 14402-88-1
-------------------------------------
Proprietary: NO
Ingredient: SODIUM HYDROXIDE, CAUSTIC SODA, LYE
Ingredient Sequence Number: 05
Percent: 0.5
NIOSH (RTECS) Number: WB4900000
CAS Number: 1310-73-2
OSHA PEL: 2 MG/CUM
ACGIH TLV: 2 MG/CUM CEILING
Other Recommended Limit: 2MG/M3 CEILING NIOSH