Technical Data Sheet

Aluminum Sulfate Hydrate ACS Grade

ACS Grade

Alliance Code: aluminum-sulfate-hydrate-acs-grade
Reviewed: 2026-07-17
Revision: 1.5

CAS number: 7784-31-8
Structure: Structure · PubChem
Grade: ACS Grade
Signal word: Danger
Hazards: CorrosiveH290 H318 H412

Last reviewed 2026-07-17 by Andre Taki, Chief Commercial Officer.

Identity & Composition

Product Name: Aluminum Sulfate Hydrate ACS Grade
Alliance Code: aluminum-sulfate-hydrate-acs-grade
Grade: ACS Grade
Concentration: —
CAS Number: 7784-31-8PubChem
Formula: —PubChem
Molecular Weight: —PubChem
Product Type: Pure substance

Specifications

Test	Specification	Typical	Method	Source
Assay (as the labeled hydrate)	98.0-102.0%	99.8 %	—	Interpreted
Calcium (Ca)	<= 0.01%	0.0013 %	—	Interpreted
Chloride (Cl)	<= 0.005%	0.00057 %	—	Interpreted
Degree of Hydration	14 - 18	16	—	Interpreted
Heavy Metals (as Pb)	<= 0.001%	0.00014 %	—	Interpreted
Insoluble Matter	<= 0.01%	0.0024 %	—	Interpreted
Iron (Fe)	<= 0.002%	0.00049 %	—	Interpreted
Magnesium (Mg)	<= 0.002%	0.00020 %	—	Interpreted
Potassium (K)	<= 0.005%	0.0008 %	—	Interpreted
Sodium (Na)	<= 0.02%	0.0050 %	—	Interpreted
Ammonium (NH4)	≤0.005 %	0.00046 %	Nessler colorimetric comparison	Interpreted
loss on drying	22 - 25 %	23.5 %	—	Interpreted

Values are reproduced from the current product reference. Source labels do not by themselves establish a supplier guarantee or a test result for your lot. Confirm applicable acceptance limits and request lot-specific documentation.

Physical & Chemical Properties

One or more physical-property values are temporarily suppressed pending verification against vendor COA data. For complete properties refer to the Safety Data Sheet (SDS) or contact sales@alliancechemical.com.

Property	Value	Source
Appearance	White crystalline powder, granular texture	Adjudicated
Form	Solid	Published reference
Odor	Odorless	Published reference
Density	0.9 - 0.91 g/cc	Interpreted
Boiling Point	Not applicable (decomposes)	Published reference
Melting Point	86°C (186.8°F)	Adjudicated
Flash Point	None (non-flammable)	Published reference
Solubility (water)	Soluble in water	Published reference

Materials of ConstructionService envelope ≈ 100%

Material	Rating	Max T (°C)	Notes	Source
Buna-N (NBR) elastomer	Good	60	Acceptable	Cole-Parmer Chemical Compatibility
EPDM elastomer	Excellent	100	Standard for brine gaskets.	Parker O-ring Chemical Compatibility
Viton (FKM) elastomer	Excellent	100	Preferred elastomer	Cole-Parmer Chemical Compatibility
Borosilicate Glass glass ceramic	Excellent	100	Universally inert to salt solutions.	Cole-Parmer Chemical Compatibility
Concrete (sealed) glass ceramic	Good	—	Acceptable with epoxy coating	Cole-Parmer Chemical Compatibility
304 stainless steel metal	Fair	25	Pitting in chloride-rich service	Cole-Parmer Chemical Compatibility
316L Stainless Steel metal	Good	60	Watch for chloride pitting above 60 °C in chloride salts.	NACE Chloride Pitting Guidelines
Aluminium metal	Poor	—	Pitting; not recommended for brine	Cole-Parmer Chemical Compatibility
Carbon steel metal	Poor	—	Rapid rust in brine	Cole-Parmer Chemical Compatibility
FRP thermoplastic	Excellent	60	Common bulk-storage	Cole-Parmer Chemical Compatibility
HDPE thermoplastic	Excellent	60	Universal salt brine compatibility.	Cole-Parmer Chemical Compatibility
PP thermoplastic	Excellent	80	Acceptable for hot brine	Cole-Parmer Chemical Compatibility
PVC thermoplastic	Excellent	60	Standard for brine piping.	Cole-Parmer Chemical Compatibility

Ratings reflect the service envelope (concentration × temperature) shown. Always confirm against your specific duty cycle and contact-time before equipment selection. The most cautious rating across overlapping references is shown.

Materials Selection Tool

Concentration (% w/w): 100%

Temperature (°C): 20

Showing 13 of 13 material ratings within the selected envelope.

Material	Rating	Max T (°C)	Notes
Buna-N (NBR) elastomer	Good	60	Acceptable
EPDM elastomer	Excellent	100	Standard for brine gaskets.
Viton (FKM) elastomer	Excellent	100	Preferred elastomer
Borosilicate Glass glass ceramic	Excellent	100	Universally inert to salt solutions.
Concrete (sealed) glass ceramic	Good	—	Acceptable with epoxy coating
304 stainless steel metal	Fair	25	Pitting in chloride-rich service
316L Stainless Steel metal	Good	60	Watch for chloride pitting above 60 °C in chloride salts.
Aluminium metal	Poor	—	Pitting; not recommended for brine
Carbon steel metal	Poor	—	Rapid rust in brine
FRP thermoplastic	Excellent	60	Common bulk-storage
HDPE thermoplastic	Excellent	60	Universal salt brine compatibility.
PP thermoplastic	Excellent	80	Acceptable for hot brine
PVC thermoplastic	Excellent	60	Standard for brine piping.

Regulatory & Transport

DOT / 49 CFR

UN Number: Not regulatedAdjudicated
Hazard Class: Not regulatedAdjudicated
Packing Group: Not regulatedAdjudicated
Proper Shipping Name: Not regulatedAdjudicated

GHS / OSHA HCS 2024

Signal Word: DangerAdjudicated
H-Codes (Hazard Statements): H290, H318, H412Adjudicated
P-Codes (Precautionary Statements): P234, P264, P273, P280, P305+P351+P338, P310, P313, P390, P406, P501Adjudicated

Occupational Exposure Limits

OSHA PEL (29 CFR 1910.1000): 2 mg/m³ TWA (Al)OSHA 29 CFR 1910.1000
ACGIH TLV: —no canonical
NIOSH REL: 2 mg/m³ TWA (Al)NIOSH Pocket Guide
NIOSH IDLH: —no canonical

Transport descriptions reflect 49 CFR 172.101 lookup at time of publication. Sourced data: NIOSH Pocket Guide for REL/IDLH, OSHA Z-Tables for PEL. Always verify against the latest regulatory text before shipment-critical decisions.

Supplier Qualification Packet

One zipped download containing the TDS, SDS, latest lot COA (when available), and a fresh Letter of Continuing Guaranty for Aluminum Sulfate Hydrate ACS Grade. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.

Download audit packet

Applications

Water-soluble reagent suitable for development, manufacturing or research applicationslabdepotinc.com
Laboratory use in high-purity applications, where ACS specifications are the de facto quality standardlabdepotinc.com

Applications are drawn from published manufacturer and supplier documentation; each is sourced. Suitability for a specific use is the buyer's to confirm.

Storage & Handling

Recommended Storage: Keep containers tightly closed in a dry, cool, well-ventilated place away from direct sunlight and heat; the material is hygroscopic. Store in corrosion-resistant containers.Adjudicated
Handling Precautions: Standard chemical PPE — dust mask and goggles for handling of fine grades. Avoid generating airborne dust.Class-level guidance — not product-specific; the SDS controls.
Incompatibilities: Strong oxidizing agents; strong bases and alkalis (may react violently); moisture; most common metals in the presence of moisture.Adjudicated
Shelf Life: Consult Technical Services for product-specific shelf life

For full hazard, PPE, and emergency response guidance, refer to the Safety Data Sheet (SDS) for this product. The SDS controls in all cases where guidance differs.

Packaging & Logistics

Shipping Description (US DOT)

Not regulated for transport.

A package holding 5,000 lb (2,270 kg) or more of this product contains a reportable quantity (RQ) and ships as:

UN3077, Environmentally hazardous substance, solid, n.o.s. (Aluminum sulfate), 9, III, RQ

Confirm against shipping documents and carrier requirements before tender.

NMFC Class

Revision History

Last reviewed 2026-07-17 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).

Version	Date	Change	Trigger
1.5	2026-10-13	Canonical data updated: 4 fields changed via the provenance/adjudication pipeline. storage_precautions· canonical change (coa.data_provenance / adjudication) incompatible_materials· canonical change (coa.data_provenance / adjudication) conditions_to_avoid· canonical change (coa.data_provenance / adjudication) hazardous_decomposition_products· canonical change (coa.data_provenance / adjudication)	canonical_change
1.4	2026-10-07	Canonical data updated: 3 fields changed via the provenance/adjudication pipeline. ghsClassification· canonical change (coa.data_provenance / adjudication) hazard_h_codes· canonical change (coa.data_provenance / adjudication) hazard_p_codes· canonical change (coa.data_provenance / adjudication)	canonical_change
1.3	2026-10-05	Canonical data updated: 2 fields changed via the provenance/adjudication pipeline. oel_niosh_rel· canonical change (coa.data_provenance / adjudication) oel_osha_pel· canonical change (coa.data_provenance / adjudication)	canonical_change
1.2	2026-09-30	Canonical data updated: 2 fields changed via the provenance/adjudication pipeline. meltingPoint· canonical change (coa.data_provenance / adjudication) appearance· canonical change (coa.data_provenance / adjudication)	canonical_change
1.1	2026-07-17	Canonical data re-verified: 8 fields updated against independent vendor SDSs, CLP Annex VI, 49 CFR, and OSHA HazCom 2024 (GHS classification, hazard/precautionary codes, signal word, physical properties as applicable). countryOfOrigin· canonical adjudication / reground (coa.data_provenance) dotSubsidiaryHazardClass· canonical adjudication / reground (coa.data_provenance) ghsClassification· canonical adjudication / reground (coa.data_provenance) hazard_h_codes· canonical adjudication / reground (coa.data_provenance) hazard_p_codes· canonical adjudication / reground (coa.data_provenance) hsCode· canonical adjudication / reground (coa.data_provenance) physicalProperties· canonical adjudication / reground (coa.data_provenance) signalWord· canonical adjudication / reground (coa.data_provenance)	canonical_change
1.0	2026-05-20	Initial URL-first TDS published from canonical chemistry registry.	initial

This Technical Data Sheet is provided for technical reference. The Safety Data Sheet (SDS) controls in all cases where guidance differs. Values reflect Alliance Chemical canonical data at time of generation; subsequent revisions are recorded in the Revision History above.