Sasol Ethyl Acetate 99.9% High Purity Factory Supply

99.9% Grade

Product Summary

High-purity ethyl acetate for moisture- and residue-sensitive work, with tighter trace water and ethanol control than the 99.8% grade. Same CAS 141-78-6, same handling rules.

CAS number141-78-6
Water limit≤0.02 wt%, against ≤0.03 wt% on the 99.8% grade
PositionReactions and cleaning steps where trace water or residue reaches the result

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Ethyl acetate supplied in a blue steel drum

Data

Typical Properties

Trace limits for the high-purity grade, as measured on production lots.

Typical values, not for specification.
Property	Limit
Purity	≥99.9 wt% (GC)
Water	≤0.02 wt%
Ethanol	≤0.02 wt%
Acidity as acetic acid	≤0.003 wt%
Colour	≤5 Pt-Co
Residue on evaporation	≤1 mg/100 ml
Density at 20 °C	0.898–0.902 g/ml

Typical values, not for specification. Sasol does not publish a separate specification for this grade; the certificate of the shipped lot governs, and lot re-test data can be supplied with the parcel.

Trace Control

Trace Impurity Control

A 0.02% water limit is only worth paying for if it survives the plant. The chain runs from the source of the impurity to the point where a lot is held.

01

Source

Trace water arrives with the feed, the storage tank and the transfer line, not only with the delivered drum.

02

Barrier

Sealed drums, dry gas blanketing and dedicated lines keep the limit meaningful after the drum is opened.

03

Verification

Karl Fischer on arrival with a dry sampling train; an open beaker sample reads high before the lab does anything wrong.

04

Response

A lot above limit is held, not blended down. Blending destroys the traceability a 99.9% order is bought for.

0.02%

Reaction yield

In esterification and Grignard steps, water consumes reagent before it reaches the substrate. Each 0.01% above plan is reagent paid for and not converted.

1 mg/100 ml

Cleaning residue

On metal and optical parts, residue at this level is the difference between a clean dry-down and a re-clean of the whole batch.

0.02%

Storage pickup

Headspace volume drives moisture pickup. A half-full drum left open can pass the limit before the quarter ends.

Arrival re-testWater by Karl Fischer, ethanol by GC, residue on evaporation and colour.
Blending checkRe-test water before mixing with a 99.8% lot; the blend is only as dry as the wetter component.

On-line checkpointsSolvent feed line, tank headspace, transfer hose and final blend before release.
Sampling practiceDry glassware, closed loop, and a sample labelled with the lot number at the point of drawing.

Handling

Handling Notes

The tighter limit is lost faster than it is bought. Four practices keep a 99.9% lot inside its specification.

Inert transferTransfer under dry inert gas; avoid lines and drums that previously carried aqueous material.
One drum at a timeOnce opened, use the drum through, or blank it with dry nitrogen between draws.
Do not blend blindCheck water before blending with a 99.8% lot; the result is set by the wetter component.
Dry samplingSample with dry glassware and a closed loop; an open sample reads high on Karl Fischer.