Sodium Metabisulfite [CAS_7681-57-4] NF/ Food/Photo Grade +97% Powder 50 Lb

Description

Wintersun code:
19-032ES
CAS Number:
7681-57-4
Molecular Formula:
Na
2
S
2
O
5
Molecular Weight:
190.1g/mol
Applications
Reducing agent for chemical manufacturing. Preservative. Auxiliary for water treatment film and photographic industry. Bleaching agent. Ensiling agent.
Sales Specification
Appearance: White or slightly yellow crystal powder
Assay (Na
2
S
2
O
5
): 97% Min
Insoluble in water: 0.03% Max
Arsenic: 0.002% as Max
Heavy Metal as Pb: 0.002%
Iron: 0.003% Max
pH: 4.0-4.6
Packing
50 lb bag
Wintersun Chemical SHIPS ONLY to the lower 48 states of America.
For Alaska, Hawaii, and Puerto Rico,  please contact us for purchasing!
RETURN/ EXCHANGE POLICY
·
FULL REFUND - 100% OF THE ITEM'S PRICE (BUYERS PAY THE RETURN SHIPPING)
Items that are not opened and still in original packing condition within 30 days.
·
PARTIAL REFUND - UP TO 50% OF THE ITEM'S PRICE (BUYERS PAY THE RETURN SHIPPING)
Items that are damaged, not in the original packing condition, or have obvious signs of use for reasons not due to the seller’s error.
·
EXCHANGE  (SELLER PAYS THE SHIPPING FOR EXCHANGE ONLY IF DUE TO THE SELLER'S ERROR)
Wintersun will replace with the same items per your request if the items are damaged during delivery, defective, or wrong due to the seller’s error.
·
The warehouse will inspect the items sent back for a refund and reserves the right to reject the returns if more than 50% of the item per packing is used. Once the return has been processed, you will receive a return email confirmation.