The Exchange has received the disclosure under Regulation 29(2) of SEBI (Substantial Acquisition of Shares & Takeovers) Regulations, 2011 for Indo Borax & Chemicals Ltd & PAC

Date: September 29, 2026 BSE Limited National Stock Exchange of India Limited The Corporate Relations Department, Exchange Plaza, Bandra-Kurla Complex, 25th Floor, Phiroze Jeejeebhoy Towers, Bandra (East), Mumbai 400 051 Dalal Street, Stock Code - KRONOX Mumbai - 400 001 Stock Code (cid:19) 544187 Nikhil Goswami Company Secretary & Compliance Officer Kronox Lab Sciences Limited Block No. 353, Village -Ekalbara, Padra, Vadodara -391 440, Gujarat, India Email: cs@kronoxlabsciences.com Dear Sir/ Madam, Sub: Disclosure under Regulation 29(2) of the Securities and Exchange B0ard of India (Substantial Acquisition of Shares and Takeovers) Regulations, 2011 (S(cid:28) EBI (SAST) Regulations") I, Jogindersingh Gianchand Jaswal ("Seller"), wish to inform you that pursuant to the Share Purchase Agreement dated August 20, 2026 ("SPA") executed between Ketan Vinodchandra Ramani, Mr. Pritesh Vinodchandra Ramani, Mr. Jogindersingh Gianchand Jaswal, Indo Borax & Chemicals Limited (Purchaser") and Zenrock Chemicals Private Limited, the Seller has sold 85,66,400 equity shares held by the Seller in Kronox Lab Sciences Limited( "Company"), constituting 23.088% of the total paid-up equity share capital of the Company to the Purchaser. In connection with the same, please find attached herewith the intimation in the prescribed format as required under Regulation 29(2) of the SEBI (SAST) Regulations. Kindly take above on record and acknowledge receipt. Thanking you. Yours faithfully, (Signatwre page follows] Signed and delivered by JOGINDERSINGH GIANCHAND JASWAL Place: Mumbai Date: September 29, 2026 Disclosures under Regulation 29(2) of SEBI (Substantial Acquisition of Shares and Takeovers) Regulations, 2011 Name of the Target Company (TC) Kronox Lab Sciences Limited (Target Company'") Name(s) of the acquirer and Persons Acting Acquirer: Indo Borax &C hemicals Limited ("Acquirer") in Concert (PAC) with the acquirer PAC: Zenrock Chemicals Private Limited ("PAC") Whether the acquirer belongs to Promoter / Pursuant to the consummation of the transaction whereby Promoter group the Acquirer has directly acquired 2,38,44,000 equity shares held by Mr. Ketan Vinodchandra Ramani, Mr. Pritesh Vinodchandra Ramani, Mr. Jogindersingh Gianchand Jaswal (in aggregate) in the Target Company, the Acquirer has acquired the right to exercise 64.26% (sixty four point two six per cent) of the voting rights in over the Target Company and the Acquirer has become the promoter of the Target Company Name(s) of the Stock Exchange(s) where the BSE Limited and National Stock Exchange of India shares of TC are Listed Limited Details of the acquisition / disposal as Number % w.r.t. total % w.r.t. total share/voting diluted follows share/voting capital wherever capital of the applicable (") TC (**) Before the acquisition under consideration, holding of: a) Shares carrying voting rights 97,96,400 26.40% 26.40% b) Shares in the nature of encumbrance NIL NIL NIL (pledge/ lien/ non disposal undertaking/ others) c) Voting rights (VR) otherwise than by NIL NIL NIL shares d) Warrants/convertible securities/any other NIL NIL NIL instrument that entitles the acquirer to receive shares carrying voting rights in the T C (specify holding in each category) e) Total (atbtc+d) 97,96,400 26.40% 26.40% Details of aeguisitienf sale a) Shares carrying voting rights aequired+| 85,66,400 23.088% 23.088%% sold b) VRs acquired / sold otherwise than by NIL NIL NIL equity shares c) Warrants/convertible securities/any other NIL NIL NIL instrument that entitles the acquirer to receive shares carrying voting rights in the TC (specify holding in each category) acquired/sold Shares encumbered / invoked / released NIL NIL NIL by the acquirer e) Total (atbtc+/-d) 85,66,400 23.088% 23.088% After the aequisitieHt sale, holding of: a) Shares carrying voting rights aequired 12,30,000 3.32% 3.32% b) Shares encumbered with the acquirer NIL NIL NIL c) VRs otherwise than by shares NIL NIL d) Warrants / convertible securities / any NIL NIL other instrument that entitles the acquirer to receive shares carrying voting rights in the TC (specify holding in each category) after acquisition 3.32% 12,30,000 3.32% e) Total (atbtc+d) M p| roo efd ff ee - rm eo naf tr a ik ac e lq t a u l/i l os pi tt mui be eln i ncf t s /ia s il nse u t ee(e r -. / sg e. r io tg rp ahe ntn s s fm eis ra s eurk te ce )t . eS PO xh rf ieaf tc er ue sm h te a P drk ue Vbrt ec is th na wa ole s e d e e co n hf aA8 M n5 g dr, r .6 r e a6 Ke , m4 et0 Re a0 n n a t me Vq adu i nnai it t o ,y e d ds c h h Ma A ar rne .u ds g rup a J su oRtr gs a iu m2 na 0 dan , e nt r it s,2o in0 t g2h M h6e r. Gianchand Jaswal, Indo Borax & Chemicals Limited and Zenrock Chemicals Private Limited. September 29, 2026 Date of aequisitient sale of shares Re F date ef reeeipt ef intimatien-ef alletment ef Esh qa ur ie tys , shw ah ri ee h ce av pe ir ta i ls /a p top tl aie la b vB oe ti ng capital of I sN haR 7 o,1 f0 fa,4 c0 ,0 v0 a0 ec o om p INri Rsi n 1g of3,71,04,000 equity th Ee q T uiC ty b she afo rere c t ah pe i ts aa li /d t oa te aq l u vi osi tit nie gn t c as pal ie ta l of sIN haR r e3 s 7 o,1 f 0 fa,4 c0 e ,0 v0 a0 lu ec o om f p INris Rin 1g 0 of 3,71I,04,000 equity t Th oe t aT l C d ia lf ut te er d t h se h as ra eid /v oa te iq ngu is ci at pie itn af l sa ofl e t he TC INR 37,10,40,000 comprising of 3,71,04,000 equity shares of face value of INR 10 after the said acquisition (*) Total share capital/ voting capital to be taken as per the latest filing done by the company to the Stock Exchange under Clause 35 of the listing Agreement. (**) Diluted share/voting capital means the total number of shares in the TC assuming full conversion of the outstanding convertible securities/warrants into equity shares of the TC. (Signatre page follows] Signed and delivered by JOGINDERSINGH GLANCHAND JASWAL Place: Mumbai Date: September 29, 2026